Two people were killed in the capital early Monday, when a mortar round slammed into a central Baghdad neighborhood and a bomb hidden in trash exploded on the city's east side, police reported. Elsewhere, two key members of Muqtada al-Sadr's political and military organization were gunned down just days before the U.S. and Iraqi forces planned to open a massive security drive in Baghdad. Ali Khazim, who ran al-Sadr's political organization in volatile Diyala province northeast of Baghdad, was killed Sunday by U.S. forces at his home in Howaider village, 20 kilometers (12 miles) east of Baqouba, Saleh al-Ageili, a spokesman for the Sadr Movement's parliamentary bloc, said on Monday. Provincial police confirmed al-Ageili's account, the Associated Press reported. The second official, Khalil al-Maliki, a key figure in al-Sadr's Mahdi Army militia in Basra, was killed by three gunmen in a drive-by shooting on Sunday in the southern city of Basra, police reported. He survived an assassination attempt in the city last year.