Iraqi Army soldiers inspect a bridge destroyed in a truck bomb attack in Ramadi, 115 kilometers (70 miles) west of Baghdad, Iraq, Saturday, Oct. 17, 2009. A suicide bomber driving an explosives-laden truck destroyed a key bridge Saturday on a highway used by the departing U.S. military. (AP Photo)

Baghdad ? A suicide bomber driving a dynamite-laden truck destroyed a key bridge, pictured above Saturday, on a highway used by the departing U.S. military, while separate attacks killed nine Iraqis, most of them security force members, police said.

There were no casualties in the blast that destroyed the bridge outside the city of Ramadi, which is about 70 miles west of Baghdad, said a local police officer. The highway is used heavily by the U.S. military to transport equipment out of the country, and is also a major roadway for civilian traffic.

The highway links Iraq to neighboring Syria and Jordan, where many Iraqis fled to escape sectarian violence.

Also Saturday, an attack on an Iraqi army convoy just outside of the city of Fallujah killed four Iraqi soldiers and wounded 14, said a police officer in the city, which is about 40 miles west of Baghdad.

Both officials spoke on condition of anonymity because they were not authorized to speak to journalists.

A U.S. military spokesman in Iraq’s western Anbar province, where both Ramadi and Fallujah are located, confirmed Saturday’s explosion on the highway bridge, which was close to two Iraqi military bases that host U.S. troops in the area.