Twitter tries to block images of Foley killing

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Twitter tries to block images of Foley killing
HIROSHIMA, JAPAN - AUGUST 20: Rescue workers at the site of a landslide in a residential area on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted people are missing after torrential rain caused flooding and landslides in the city of Hiroshima early on Wednesday August 20, 2014. (Photo by Buddhika Weerasinghe/Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: A man walks through the flood water at the site of a landslide in a residential area on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted people are missing after torrential rain caused flooding and landslides in the city of Hiroshima early on Wednesday August 20, 2014. (Photo by Buddhika Weerasinghe/Getty Images)
This aerial view shows damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. The number of people known to have died when a hillside collapsed in western Japan has hit 27, the government said on August 20, with a further 10 people still unaccounted for. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. The number of people known to have died when a hillside collapsed in western Japan has hit 27, the government said on August 20, with a further 10 people still unaccounted for. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
HIROSHIMA, JAPAN - AUGUST A pet dog carried by the Japanese Self Defense Force at the site of a landslide in a residential area on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted people are missing after torrential rain caused flooding and landslides in the city of Hiroshima early on Wednesday August 20, 2014. (Photo by Buddhika Weerasinghe/Getty Images)
This aerial view shows rescue workers looking for survivors at the site of a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. The number of people known to have died when a hillside collapsed in western Japan has hit 27, the government said on August 20, with a further 10 people still unaccounted for. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
Cars damaged by a landslide lie in mud and debris after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. The number of people known to have died when a hillside collapsed in western Japan has hit 27, the government said on August 20, with a further 10 people still unaccounted for. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) A house is collapsed in the end of a street blocked by fallen trees on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) People wait for rescue on the roof of a house on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
Collapsed houses sit surrounded in mud after a landslide hit the area caused by heavy rains in the city of Hiroshima, western Japan, on August 20, 2014. The number of people known to have died when a hillside collapsed in western Japan has hit 27, the government said on August 20, with a further 10 people still unaccounted for. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) Mud water fall down from the street on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) Rescue workers including police officers and firefighters scoop the mud out of a house on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) Houses and cars are soaked in mud water after the landslide on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) A rescue worker walks on a stone fence by the mud covered street on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) Houses and cars are soaked in mud water after the landslide on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) A woman carried by rescue workers arrives at the Hiroshima Heliport after being rescued from the landslide damaged area on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) Houses and cars are soaked in mud water in the area damaded by landslides after heavy rain and rescue workers are seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) Houses and cars are soaked in mud water after the landslide on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain and rescue workers are seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain and rescue work are seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain and rescue workers are seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the flooding Ota River after the heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
HIROSHIMA, JAPAN - AUGUST 20: (CHINA OUT, SOUTH KOREA OUT) In this aerial image, the damage caused by landslides after heavy rain is seen on August 20, 2014 in Hiroshima, Japan. At least 18 people were confirmed dead and several unaccounted number of people are missing after the torrential rain caused flooding and landslides in the city of Hiroshima early Wednesday August 20, 2014. (Photo by The Asahi Shimbun/The Asahi Shimbun via Getty Images)
A man stands on debris at the site of a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
A man (C-top) stands on a debris piled high at the site of a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
Rescue workers look for survivors at the site of a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
Soldiers and rescue workers look for survivors at the site of a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
A rescue helicopter flys over the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows policemen and rescue workers looking for survivors at a landslide site after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows policemen and rescue workers looking for survivors at a landslide site after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
A rescue helicopter flys over the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows policemen and rescue workers looking for survivors at a landslide site after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO/Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO / Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This aerial view shows the damage caused by a landslide after heavy rains hit the city of Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO / Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
This photo shows houses surrounded by debris after a landslide caused by heavy rains hit the neighborhood in Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO / Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
Police and rescue workers head up a hill toward the disaster zone after heavy rains caused a landslide (top C) in Hiroshima, western Japan, on August 20, 2014. At least 18 people were killed and another 13 were still missing after a huge landslide engulfed homes in western Japan, reports said on August 20. JAPAN OUT AFP PHOTO / Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
Police and rescue workers inspect the site of a landslide caused by heavy rains in Hiroshima, western Japan, on August 20, 2014. At least four people were killed and several more are missing by landslides in Hiroshima, rescuers said on August 20, while local media reported the death toll had reached seven. JAPAN OUT AFP PHOTO / Jiji Press (Photo credit should read JIJI PRESS/AFP/Getty Images)
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AMSTERDAM (AP) - Twitter is trying to block the spread of gruesome images of the beheading of journalist James Foley by Islamic State militants, while a movement to deny his killers the publicity they crave is also gaining momentum.

In a Tweet published late Tuesday California time, CEO Dick Costolo said his company "is actively suspending accounts as we discover them related to this graphic imagery," and he gave a link to a New York Times story about Foley's killing.

Twitter spokesman Nu Wexler confirmed Costolo's Tweet and referred further questions to a company policy page. Twitter allows immediate family members of someone who dies to request image removals, although the company weighs public interest against privacy concerns.

Twitter users who oppose spreading the images are using the trending hashtag #ISISMediaBlackout.

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