for the door. >> reporter: in this video from our affiliate wfaa, two hostages and the rabbi are seen leaving from a side door, followed by a man holding a gun. less than a minute after the man moved back inside the building, gunfire erupts. and the fbi hostage rescue team quickly rushes in. tonight, investigators say that akram, who was not on any u.s. government watch list, arrived in new york from london more than two weeks ago before traveling to texas. the incident in colleyville unfolding saturday morning when the rabbi says he answered a knock on a synagogue window. the rabbi saying he and akram spoke over tea. >> at 10:45 a.m., akram interrupting th iing shabbat se. >> he said he had a gun. it's a nightmare. >> reporter: for hours, fbi crisis negotiators speaking to the suspect, who allegedly threatened to kill the four