NEW The attack targeted Shiite mourners , who were at the mosque for a funeral . : At least four people are killed in a separate attack in Iraq 's Kurdish region . Baghdad has seen a sharp increase in violence between its Shiite and Sunni populations . 42 other people were killed while attending a prayer at the mosque .
NEW : At least four people are killed in a separate attack in Iraq 's Kurdish region . Baghdad has seen a sharp increase in violence between its Shiite and Sunni populations . 42 other people were killed while attending a prayer at the mosque .