Insurgents launched a deadly coordinated attack on an American combat patrol, detonating a roadside bomb, then firing guns and rocket-propelled grenades at the soldiers, the U.S. military said Friday. Five troops were killed. Seven soldiers were wounded in the attack on Thursday in southern Baghdad and were evacuated to a military hospital; one has since returned to duty, The Associated Press quoted the military as saying. The deaths brought to 99 the number of U.S. troops to die in Iraq this month, according to an Associated Press count. The toll for the past three months _ 329 _ made it the deadliest quarter for U.S. troops in Iraq since the war began in March 2003. At least 3,576 members of the U.S. military have died since then, according to AP figures. The number includes seven military civilians. At least 2,936 died as a result of hostile action, according to the military's numbers.