A roadside bomb blew up a United Nations vehicle near the southern Lebanese port city of Sidon on Tuesday, wounding six French peacekeepers.

"It was a roadside bomb that hit a U.N. troop carrier on a bridge in Sidon," a Lebanese security official said.

Lebanon's Prime Minister Najib Mikati ordered an investigation into the incident, his office said in a statement.

Footage from the scene showed two wounded peacekeepers standing near the vehicle, one with a bandage covering one of his eyes and another with a small bandage on his neck.

The vehicle was slightly burnt and its mounted gun was on the ground.

Spokesman Neeraj Singh of the U.N. Interim Force in Lebanon (UNIFIL) confirmed an explosion occurred but said the circumstances have yet to be determined.

"UNIFIL forensic experts are at the scene and we are working in coordination with the Lebanese army to determine the circumstances of the incident," he said.

A similar attack near Sidon in May wounded six Italian peacekeepers, prompting Italy to look into reducing its peacekeeping contingent in Lebanon.

UNIFIL, which is made up of 35 nations, has about 12,000 troops and naval personnel in Lebanon after its expansion under U.N. Security Council resolution 1701 that halted the Israeli bombing into southern Lebanon in 2006.

Reuters