Tbilisi, Georgia ? A court Wednesday convicted a man of trying to assassinate President Bush and the leader of Georgia by throwing a grenade at them during a rally last year, and it sentenced him to life in prison.

Vladimir Arutyunian also was convicted of killing a policeman during a shootout while authorities were trying to arrest him several weeks after the May 10, 2005, grenade incident at a rally that drew tens of thousands of people to Tbilisi, the capital of this former Soviet republic.

The grenade that Arutyunian threw during the rally attended by Bush and President Mikhail Saakashvili landed about 100 feet from the stage where they were standing behind a bulletproof barrier and did not explode. No one was hurt.

Arutyunian, 27, has acknowledged that he threw the grenade in the direction of the stage and said he would try again to kill Bush if he had the chance.