Bombings struck four coalition and Iraqi military convoys and a provincial government office Monday, killing at least eight people, including an American soldier and an Estonian trooper in the Baghdad area. Coming a day after the bodies of nearly 50 Iraqi military recruits were found massacred, the bombings occurred as a U.N. agency confirmed that several hundred tons of explosives were missing from a former Iraqi military depot in an insurgent hotspot south of Baghdad. The revelation raised concerns the explosives fell into the hands of insurgents who have staged a spate of bloody car bombings, although there was no evidence to link the missing explosives directly to the attacks. On Monday, a roadside bomb in western Baghdad killed one U.S. soldier and wounded five, the U.S. military said. --More 0007 Local Time 2107 GMT