Italy's government summoned the United States ambassador to Rome for talks Tuesday amid national outrage over a U.S. Army report that is to clear American troops of wrongdoing in a shooting that left an Italian agent dead in Iraq. Italian Prime Minister Silvio Berlusconi met with Ambassador Mel Sembler for about an hour at the government's headquarters of Palazzo Chigi. Although there was no immediate confirmation, Sembler was expected to be asked to explain U.S. news reports saying a yet-to-be-made- public U.S. investigation into the killing of Nicola Calipari will recommend that no disciplinary action be taken against the soldiers who opened fire on his car. The report came at an embarassing time for Berlusconi, who is busy trying to appease his centre-right coalition partners after the collapse of his 4-year-old government. His allies forced him to resign last week in the wake of the coalition's stunning defeat in recent regional elections, a defeat that was in part blamed on the premier's unpopular decision to send about 3,000 troops to Iraq. --MORE 2254 Local Time 1954 GMT