VIDEO - Surveillance videos clearly show Ahmad Mahmoud Khatib - perpetrator of the Friday shooting in the Old City of Jerusalem - stealing a gun from a security guard and shooting him, despite claims to the contrary by his family. Jerusalem police authorized the publication of the surveillance tapes on Sunday. Khatib grabbed a weapon from a guard of the Ateret Kohanim yeshiva and then set off through the Old City's street shooting back wildly at another yeshiva guard who pursued him. Ten bystanders and one of the guards were injured in the crossfire before the shooter was killed. When the incident was first broadcast, some witnesses claimed that the guard had shot and killed Khatib once he was already down. This allegation was later repeated by Arab Knesset member Ahmed Tibi, but as can be seen, is not evident from the video. Khatib's acquaintances and relatives of the shooter expressed disbelief that he had been involved in the incident at all, saying he "was a quiet and introverted person… simply a person who is incapable of doing such a thing". Some acquaintances went as far as to say that incident was made up by the two security guards in order to avoid murder charges, claiming that "there is no evidence" that Khatib had tried to snatch the gun and that the incident constituted "first-degree murder" in which the man was "killed for nothing". Meanwhile, over the weekend, three Palestinian organizations – the military wings of Fatah, the Islamic Jihad and the Popular Front for the Liberation of Palestine – claimed responsibility for the attempted terror attack which they referred to as "a military operation" in Jerusalem. The Shin Bet has been given exclusive control over the case and will try to determine whether Khatib was affiliated with a particular Palestinian organization or whether he was working independently. On Friday, Shin Bet operatives questioned several residents of the shooter's hometown, the Arab-Israeli village of Kfar Manda, in order to learn more about Khatib's background and potential connections.