An international manhunt began Tuesday for the assassins responsible for the targeted death of a senior Hamas official in Dubai in January. Authorities have so far been derailed by fake identities, stolen from British citizens residing in Israel. The suspected team of 11 professional assassins includes six British and three Irish citizens, according to Dubai police, who unveiled the fake passports at a news conference Monday. The victim, Mahmoud al Mabhouh, was a senior Hamas official, and many have suspected that Israel's intelligence service may have been behind his assassination. Hamas has openly accused Israel of the killing and vowed revenge.