The four, who had been held hostage in a synagogue on the outskirts of Dallas, Texas, were released unharmed after a 10-hour standoff with police.
They were taken hostage during a morning service in Colleyville on Saturday.
Police deployed a special weapons team, and FBI negotiators spoke with the perpetrators for hours.
Explosions and shootings were heard before the incident was over. According to police, the hostage criminal subsequently died.
According to US media reports, the four hostages included a synagogue rabbi.
The service was being streamed online when the incident began. One of the hostages was released unharmed after 6 hours and the other 3 were safely led by police a few hours later.
The rescue team defeated the synagogue, but it is not yet clear how the hostage criminal died or who he was.
President Joe Biden was briefed on the developing situation.
The incident began around 11:00 local time (16:00 GMT) when police were called to the congregation Beth Israel Synagogue. Immediately after, people evacuated from the area.
Facebook’s Shabbat Morning Service live stream captured the voice of a man speaking loudly. I could hear him saying, “You call my sister” and “I’m going to die.”
He also heard saying, “There is something wrong with America.” Then the feed was deleted.
The hostage criminal also heard that he is demanding the release of Pakistani neuroscientist Aafia Siddiqui, who is currently serving 86 years in prison in the United States.
Siddiqui was convicted of attempting to kill a U.S. military officer while in custody in Afghanistan.
Barry Kronpas, a member of the congregation since its opening in 1999, said he was informed of the incident by another member and turned to the live feed immediately until it was withdrawn.
“It was terrible to hear and see, and even worse to not know,” he told Reuters.
She told The Associated Press that Victoria had heard a man ranting against the United States and claimed to have had a bomb during the live stream. “He’s pretty frustrated, and the more frustrated he is, the more threat he will pose,” she said.