NEW : Attack is deadliest on Baghdad forces in more than a year . Suicide bomber explodes truck at national police headquarters in Mosul . At least two individuals suspected of being involved in the attack were detained , the U.S. military said . eight Iraqi among Five dead ; 60 others wounded . Mosul , 260 miles north of Baghdad , called last urban stronghold of al Qaeda in Mosul .
NEW : Attack is deadliest on Baghdad forces in more than a year . Suicide bomber explodes truck at national police headquarters in Mosul . eight Iraqi among Five dead ; 60 others wounded . Mosul , 260 miles north of Baghdad , called last urban stronghold of al Qaeda in Mosul .