A US Marine charged with kidnapping and murdering an Iraqi man last spring assaulted another man in a separate incident because he made ”disparaging remarks” about Marines while in Abu Ghraib prison, a court has heard.

A man wearing a police uniform drove a car bomb inside the headquarters of police in Saddam Hussein’s hometown of Tikrit today, setting off a massive explosion that killed at least 15 police and wounded 22 others, police and witnesses said.