April 20 (Reuters) - Following are security developments in Iraq as of 0700 GMT on Friday: MAHMUDIYA - A U.S. soldier was killed and two wounded on Thursday when a rocket struck a U.S. military base in Mahmudiya, 30 km (20 km) south of Baghdad, the U.S. military said. BAGHDAD - Twenty bodies were found in different areas of Baghdad on Thursday, police said. BAGHDAD - Gunmen opened fire on civilians in Saadoun street in central Baghdad on Thursday, killing three people and wounding two, police said. BAGHDAD - Two policemen were killed and three wounded when they were attacked by gunmen on Thursday in the northern Baghdad district of Waziriya, police said.
