At least 23 people were killed and dozens were wounded Monday when two car bombs, including one driven by a suicide attacker, blew up in different parts of Baghdad, ap quoted police sources as saying. Neither of the attacks took place in parts of the sprawling city where visiting Iranian President Mahmoud Ahmadinejad was located. In an unrelated incident, the U.S. military reported finding a grave containing 14 people. In Baghdad's deadliest attack, a parked car bomb killed at least 21 people and wounded 43 in central Baghdad's Bab al-Mudham neighborhood on the eastern bank of the Tigris. The car was parked on a road leading to the Housing and Municipality Ministry, police said. The dead included one police officer, while another four were wounded. In the suicide attack, a man drove a mini bus at the headquarters of the Interior Ministry's 4th Brigade, a special quick reaction force based in Baghdad's eastern Zayouna neighborhood. The blast killed at least two police officers and wounded six other people. Associated Press images taken after the blast showed massive damage to homes in the neighborhood. In yet another attack on Monday, police reported that three officers were killed by a parked car bomb in the town of Shikaat, north of Baghdad.