A truck packed with explosives detonated near an Iraqi National Guards barracks Tuesday in western Baghdad (search), killing ten people and wounding 50, police said.

A homicide bomber (search) rammed the truck at an Iraqi police checkpoint which was also near an entrance of the Green Zone, the fortified home of the U.S. Embassy and headquarters of the interim Iraqi government.

The barracks serves as a recruiting center for the paramilitary Guards who have been repeatedly targeted by insurgents who are trying to derail this month's parliamentary elections.

The explosion occurred not far from the site of Monday's explosion in front of Iraqi Prime Minister Ayad Allawi's (search) party headquarters that killed 2 police officers, one civilian and injured 25 other Iraqis.

Thick white smoke billowed from the area of Tuesday's blast which echoed throughout the capital.