Las Vegas shooter Stephen Paddock had recent large gambling transactions


The suspected gunman behind the Las Vegas massacre made several large gambling transactions in recent weeks, according to law enforcement officials.

The transactions by Stephen Paddock were in the tens of thousands in Las Vegas, the officials said. 

It was not immediately clear if those transactions were losses or wins. 

Paddock's brothers were stunned to learn Monday that their sibling was the suspected perpetrator of the largest mass shooting in modern American history.

Eric Paddock of Orlando, Florida, said he had "no idea" why his 64-year-old brother committed the shooting.

“Mars just fell into the earth,” he told NBC News. “We’re completely dumbfounded.”

The most devastating images from the Las Vegas concert shooting: 

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The most devastating images from the Las Vegas concert shooting
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The most devastating images from the Las Vegas concert shooting
LAS VEGAS, NV - OCTOBER 01: A man lays on top of a woman as others flee the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: People run from the Route 91 Harvest country music festival after apparent gun fire was hear on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 02: A cowboy hat lays in the street after shots were fired near a country music festival on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: People run for cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01:  A person lies on the ground covered with blood at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01:  A person lies on the ground at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: (People carry a peson at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: People take cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: A man in a wheelchair is taken away from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
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Eric Paddock said his brother was retired and was "just a guy" who went to the hotels, gambled, and went to shows.

Related: Trump Tweets Condolences on Las Vegas Massacre

Stephen Paddock's brother Bruce Paddock, who lives in California, said his family grew up in Sun Valley, California.

Bruce, who said he hadn't talked to Stephen, who lived in Mesquite, Nevada, about 80 miles northeast of Las Vegas, in approximately 10 years, said his brother made money through apartment buildings, which he owned and managed with his mother, who lives in Florida.

"I don't know how he could stoop to this low point, hurting someone else," Bruce said.

He added that his brother was a laid-back, "never-in-a-hurry" type of guy. Bruce said his brother was a law-abiding citizen who never did anything violent prior to the shooting.

The shooting is not believed to be connected to international terrorism, NBC News has learned.

The suspect was a licensed pilot, who owned two planes. He also had a hunting license from Alaska.

It is believed he lived in a retirement community in Mesquite.

RELATED: President Donald Trump speaks out on Vegas shooting 

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President Donald Trump speaks out on Vegas shooting
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President Donald Trump speaks out on Vegas shooting
US President Donald Trump arrives in the Diplomatic Reception Room to deliver a statement on the Las Vegas shootings at the White House on October 2, 2017. / AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
U.S. President Donald Trump arrives to deliver a statement on the mass shooting in Las Vegas from the Diplomatic Room at the White House in Washington, U.S., October 2, 2017. REUTERS/Kevin Lamarque
U.S. President Donald Trump makes a statement on the mass shooting in Las Vegas in front of a portrait of President George Washington in the Diplomatic Room at the White House in Washington, U.S., October 2, 2017. REUTERS/Kevin Lamarque
U.S. President Donald Trump makes a statement on the mass shooting in Las Vegas in front of a portrait of President George Washington in the Diplomatic Room at the White House in Washington, U.S., October 2, 2017. REUTERS/Kevin Lamarque
U.S. President Donald Trump makes a statement on the mass shooting in Las Vegas from the Diplomatic Room at the White House in Washington, U.S., October 2, 2017. REUTERS/Kevin Lamarque
U.S. President Donald Trump departs after making a statement on the mass shooting in Las Vegas from the Diplomatic Room at the White House in Washington, U.S., October 2, 2017. REUTERS/Kevin Lamarque
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