Man takes hostages at U.S. synagogue, demands release of Pakistani neuroscientist Aafia Siddiqui

US authorities said a man took hostages during services at a Texas synagogue where the suspect could be heard ranting in a livestream and demanding the release of a Pakistani neuroscientist who was convicted of trying to kill U.S. Army officers in Afghanistan.

At least four hostages were initially believed to be inside the synagogue, according to two law enforcement officials who were not authorised to discuss the ongoing investigation and who spoke to The Associated Press on the condition of anonymity. The synagogue's rabbi was believed to be among the hostages, one of the officials said. A law enforcement official said the man claimed to be armed but authorities have not confirmed whether he is.

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The Colleyville Police Department said one hostage was released uninjured shortly after 5 p.m. Saturday. The man was expected to be reunited with his family and did not require medical attention.

Authorities are still trying to discern a precise motive for the attack. The hostage-taker was heard demanding the release of Aafia Siddiqui, a Pakistani neuroscientist suspected of having ties to al-Qaeda, who was convicted of trying to kill U.S. military officers while in custody in Afghanistan, the officials said. He also said he wanted to be able to speak with her, according to the officials. Siddiqui is in federal prison in Texas.

The officials said investigators have not positively identified the man and cautioned that the information was based on a preliminary investigation as the situation was still rapidly developing.