An FBI Hostage Rescue Team stormed a synagogue in Colleyville, Texas on Saturday night to free three remaining hostages of a gunman who had disrupted a religious service and began a standoff with police more than 10 hours earlier.

Axar.az reports that all the hostages were safely released on Saturday night and the gunman was dead, Colleyville Police Chief Michael Miller told a news conference.

The gunman had initially taken four people, hostage, including the rabbi, at the Congregation Beth Israel, officials said. One hostage was released unharmed six hours later.

Reporters said they heard the sound of explosions, possibly flashbangs, and the sound of gunfire shortly before Texas Governor Greg Abbott announced the crisis was over.

"Prayers answered. All hostages are out alive and safe," Abbott said on Twitter. The FBI said they have confirmed the identity of the gunman but said they would not yet disclose it. The FBI declined to confirm the cause of his death, saying it was still under investigation.