Three Iraqi policemen killed in suicide attack south of Mosul

Three policemen were killed on Sunday in a suicide attack south of Mosul, the northern Iraqi city where Islamic State is fighting off a U.S.-backed offensive, security sources said.A group of about 10 assailants, including four suicide bombers, had tried to infiltrate a Federal Police helicopter base in Al-Areej, a police captain told Reuters.Three policemen and three of the assailants were killed in the attack, he said.