AFP - A suicide car-bomber was killed when he rammed his explosives-laden vehicle into a US-led coalition convoy in southern Afghanistan, a witness and an official said but there were no military casualties.

A local police commander in the restive Spin Boldak district of Kandahar province said the convoy comprised several vehicles of French troops operating under the US-led coalition in the region.

"No one but the attacker was killed in the explosion. It was a suicide car bomb," the commander who asked not to be named said.

Abdullah, 22, a shopkeeper in Spin Boldak town on the Pakistani border said he saw the explosive-packed vehicle slamming into the convoy.

"I saw it. It was a Corrolla car which hit itself into the convoy. Later I heard a huge bang and saw a big fire," Abdullah, who like many other Afghans uses only one name, told AFP after being contacted from the nearby Kandahar city.

The US-led coalition headquarters in Kabul gave no comment.