At least four suspected jihadists and a Malian soldier were killed on Friday following an attack on a United Nations military camp in Timbuktu in Mali's restive north, a Malian security source said.

The assault came just a day after the fabled city celebrated the restoration of its greatest treasures -- earthen mausoleums dating to mediaeval times that were destroyed during an Islamist takeover in 2012.

Hours of fighting followed the early morning attack on the camp in the south of Timbuktu, the source said, adding that the offensive against the attackers ended in the afternoon.

"At least four terrorists were killed, including those who blew themselves up in their vehicles, (and) three Malian soldiers were wounded and one killed," the source said.

"A Malian officer who was taking part in the hunt for the terrorists was unfortunately killed when a wall collapsed on his armoured vehicle. But we are continuing search-and-sweep operations and we will also continue patrolling to ensure the security of the local population," the source said.

The raid was essentially a double attack with the assailants first blowing up their vehicle at a military roadblock near the camp and a second vehicle then coming in with others who started firing.

A Nigerian peacekeeper was slightly wounded along with a civilian.AFP