A roadside bomb killed an American soldier north of Baghdad on Sunday, the US military said - the sixth US combat death in the last three days. The bombing reflected still-persistent dangers across Iraq, even as US battle deaths have dropped sharply since 2007 and Christians around the country gathered to celebrate Easter. A statement said only that the soldier was mortally wounded in a roadside bombing in Salahuddin province, north of Baghdad. Five US soldiers were killed Friday in a suicide truck bombing in the northern city of Mosul. It was the biggest loss of US life in a single blast in more than a year.