A car bomb exploded in the early hours of Baghdad's Wednesday morning, killing at least 40 Iraqis in the second such bombing in Iraq in less than 24 hours.

The citizens of Baghdad were awakened by a massive explosion, just before 0800 local time, Wednesday -- less than a day after a car bomb killed more 50 than people south of the capital, at a police station. An America military spokesman says the blast occurred outside an Iraqi Army recruitment facility in central Baghdad.

The facility is on the grounds of the former international airport and just a short distance from coalition headquarters.

Yesterday's blast ripped through a police station in Iskandariya, just before midday, killing and maiming people and wreaking havoc on the neighborhood.

U.S. military officials have blamed past attacks on foreign fighters linked with al-Qaida and on Iraqi insurgents loyal to Saddam Hussein, who see the Iraqi police and others working with the new government as collaborators with the American-led coalition.

In a two separate attacks Monday in Baghdad, several policemen were killed in ambushes while they sat in their cars.