Colombian authorities say leftist rebels have attacked a military convoy in southern Colombia with explosives, killing 10 servicemen.

A military commander says the attack was carried out by the Revolutionary Armed Forces of Colombia (FARC) in Putumayo state, one of Colombia's biggest cocaine-producing regions.

The FARC, along with a smaller rebel group and rightist paramilitaries, is locked in a long-running war with the government that leaves thousands of people dead each year.

Some information provided by AP and Reuters.