The captor, who took for hostages in a synagogue in Colleyville, Texas and was killed after an hourslong standoff, was a British national, an AP report said. While, he has not been names, several reports in the initial hours of the crisis said the hostage-taker’s name was Muhammed Siddiqui, the brother of Aafia Siddiqui,  a Pakistani neuroscientist who was convicted of trying to kill U.S. Army officers in Afghanistan. He was heard ranting on a livestream and demanding her release. 

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The UK Foreign Office said it was aware of the death of a British man in Texas and was in contact with the local authorities, BBC reports. 

Multiple people heard the hostage-taker refer to Siddiqui as his “sister” on the livestream. But John Floyd, board chair for the Houston chapter of the Council on American-Islamic Relations, — the nation’s largest Muslim advocacy group — said Siddiqui’s brother, Mohammad Siddiqui, was not involved.

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“This assailant has nothing to do with Dr. Aafia, her family, or the global campaign to get justice for Dr. Aafia. We want the assailant to know that his actions are wicked and directly undermine those of us who are seeking justice for Dr. Aafia,” said Floyd, who also is legal counsel for Mohammad Siddiqui.

“We have confirmed that the family member being wrongly accused of this heinous act is not near the DFW Metro area.”

The captor interrupted a morning service at the synagogue and took four hostages, including the rabbi. After hours of negotiations with FBI, one hostage was freed. 

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Soon, three others got out when an FBI SWAT team entered the building, authorities said.

The hostage-taker was killed, and FBI Special Agent in Charge Matt DeSarno said a team would investigate “the shooting incident.” But FBI and police spokeswomen declined to answer questions about who shot the man.

With inputs from the Associated Press