Gunmen kill 2 top-level Iraqi crime fighters
No coalition forces injured as car bomb strikes convoy
Remains of a car bomb litter a road Saturday in Mosul. The bomb exploded as a coalition convoy passed.
Interior Ministry officials gunned down in Baghdad.
The Islamic Army in Iraq created a video detailing its attacks.
Iraqi Red Crescent and U.S. troops cooperate to aid Falluja.
BAGHDAD, Iraq (CNN) -- Two high-ranking Iraqi Interior Ministry officials were gunned down Saturday morning in southwest Baghdad, a police official said.
Col. Razaq Adbul Kahreen and Col. Abdul Kahreem Farhan were on their way to work in the ministry's criminal intelligence department when the gunmen sprayed their private vehicle with bullets.
Authorities said the attack took place about 7 a.m. when the car was stopped at an intersection.
About three hours later, a car bomb targeting a coalition convoy exploded in the northern city of Mosul, causing no casualties among the forces, military spokesman Lt. Col. Paul Hastings said.
Hastings said there were reports of civilian casualties, but he provided no details.
On Friday, insurgents in Ramadi, west of Baghdad, used a hospital to stage an ambush on U.S. Marines in the city, according to a military statement.
There were no U.S. casualties.
The attackers turned off all the lights in and around the hospital as units of the 1st Marine Division of the Marine Expeditionary Force approached.
Muzzle flashes from the insurgents' weapons could be seen from hospital windows.
Ramadi is 60 miles (96 kilometers) west of Baghdad, outside Falluja.
Meanwhile, an Iraqi election group has announced that three of its workers died in a drive-by shooting this week.
Sayid Essa Sayid Jaafar, a spokesman for the Hezbollah Movement in Iraq, said masked gunmen in a black BMW and a Daewoo opened fire Wednesday night on the members at a market area in the Shula neighborhood of Baghdad.
Sattar Jabbar al-Mishari, head of Hezbollah's operations in Baghdad, and two office workers died. Al-Mishari had received death threats because of his participation in the election process, Jaafar said.
This election group is not affiliated with the militant movement in Lebanon or another in Iraq that also bear the Hezbollah name.
Al-Mishari's organization is one of the groups that joined the United Iraq Alliance, the largely Shiite coalition that is fielding candidates for the January 30 election.
The Independent Electoral Commission of Iraq announced a change Friday in the deadline for candidate-list registration.
Wednesday is the nationwide deadline. Previously, the cut-off had been today for 15 of 18 provinces, and Wednesday for the country's three most restive provinces -- Anbar, Salah ad Din and Nineveh.
Falluja and Ramadi are in Anbar, Samarra and Tikrit are in Salah ad Din, and Mosul and Tal Afar are in Nineveh.
After Wednesday, the political parties and entities will not be allowed to make any further changes to their lists, names, and logos.
Other developments:Two hundred members of Britain's Black Watch regiment returned to their base in England on Saturday after a contentious deployment to back up U.S. forces in Iraq. (Full story)Iraqi police found the body of an Iraqi national guardsman Saturday morning in Baquba, about 30 miles (48 kilometers) north of Baghdad, according to police officials. They identified the man as Lt. Muhamed Taher.The U.S. military said Saturday that an American soldier has been sentenced to three years in prison after he pleaded guilty to killing a severely wounded Iraqi civilian a few months ago. In a statement, the military said Staff Sgt. Johnny Horne Jr., 30, of Winston-Salem, North Carolina, was also reduced to the rank of private, given a dishonorable discharge and forced to forfeit all pay. It added that Horne had pleaded guilty to one charge of murder and one of conspiracy to commit murder stemming from his killing on August 18 of the civilian in Baghdad's Sadr City neighborhood.
CNN's Mohammed Tawfeeg contributed to this report.