A string of attacks on Sunday left at least six people killed and seven injured in northern Iraq, police told the German Press Agency "DPA". In Sunday morning's worst attack, a roadside bomb killed four police officers and injured two others on patrol in the western Mosul district of al-Yarmuk, police said. To the east of the city, in the Mosul neighborhood of al-Mithaq, two civilians were fatally shot when they were caught in crossfire between police and gunmen, police told "DPA".