Flour triggers anthrax alert at Brussels mosque

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Suspicious Powder Delivered to Brussels Mosque

Envelopes containing white powder were sent to a Brussels mosque but emergency crews who rushed to the scene said the substance was just flour, officials told NBC News.

The Belgian capital has been on lockdown after officials warned extremists may be planning a Paris-style attack.

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Flour triggers anthrax alert at Brussels mosque
A picture taken on November 26, 2015 shows ambulances, police and fire fighter vehicles outside the mosque after a suspect letter with powder was found at the Great Mosque in Brussels on November 26, 2015. AFP PHOTO / BELGA / ERIC LALMAND ***BELGIUM OUT*** / AFP / BELGA / ERIC LALMAND (Photo credit should read ERIC LALMAND/AFP/Getty Images)
A decontamination unit personnel gets dressed in front of Brussels' Great Mosque in Brussels on November 26, 2015. The Great Mosque of Brussels was evacuated and 11 persons decontaminated after the discovery of a suspicious package containing white powder as the EU capital remained on highest possible terror alert. AFP PHOTO / EMMANUEL DUNAND / AFP / EMMANUEL DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
Policemen and firemen set a security cordon around Brussels' Great Mosque in Brussels on November 26, 2015. The Great Mosque of Brussels was evacuated and 11 people decontaminated after the discovery of a suspicious package containing white powder as the EU capital remained on highest possible terror alert. AFP PHOTO / EMMANUEL DUNAND / AFP / EMMANUEL DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
Policemen and firemen set a security cordon around Brussels' Great Mosque in Brussels on November 26, 2015. The Great Mosque of Brussels was evacuated and 11 people decontaminated after the discovery of a suspicious package containing white powder as the EU capital remained on highest possible terror alert. AFP PHOTO / EMMANUEL DUNAND / AFP / EMMANUEL DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
Policemen and firemen set a security cordon around Brussels' Great Mosque in Brussels on November 26, 2015. The Great Mosque of Brussels was evacuated and 11 people decontaminated after the discovery of a suspicious package containing white powder as the EU capital remained on highest possible terror alert. AFP PHOTO / EMMANUEL DUNAND / AFP / EMMANUEL DUNAND (Photo credit should read EMMANUEL DUNAND/AFP/Getty Images)
Firefighters stand outside the mosque after a suspect letter with powder was found at the Great Mosque in Brussels on November 26, 2015. AFP PHOTO / BELGA / ERIC LALMAND ***BELGIUM OUT*** / AFP / BELGA / ERIC LALMAND (Photo credit should read ERIC LALMAND/AFP/Getty Images)
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Specialist units rushed to the city's Grand Mosque after the envelopes were discovered there, fire brigade spokeswoman Malika Abbad told NBC News.

Officials initially said at least 11 people who came into contact with the powder would be taken for hospital for blood tests.

But Abbad later said the white substance was "obviously flour," adding: "There is no risk to anyone."

The fire brigade's "anthrax alert" response involved at least four specialist ambulances as well as crews wearing protective suits

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