BAGHDAD, May 29 (Reuters) - Another two U.S. soldiers have been killed in Iraq, the U.S. military said on Tuesday, bringing to 114 the number killed in May and thus making it the deadliest month for U.S. troops since November 2004. Eight soldiers had earlier been reported to have been killed on Monday, Memorial Day in the United States. November 2004 was the worst month for U.S. forces, when 137 soldiers died. Another 135 died in April 2004.