TRIPOLI, Aug. 27 (Xinhua) -- Libya's UN-backed government on Monday condemned the ongoing clashes in the south of the capital Tripoli between government forces and militias.

"The Presidential Council of the Government of National Accord condemns and denounces the armed attack on the outskirts of Tripoli City by some outlawed gangs and armed groups," the government said in a statement.

The security forces have been instructed to intervene, it noted, vowing to "bring the militias to justice according to relevant UN Security Council resolutions."

The statement called the attack "a threat to the safety and security of the people," accusing it of attempting to "obstruct local and international efforts to establish stability" in Libya.

Clashes have been going on since Sunday night between forces of the UN-backed government and armed militias in southern Tripoli, killing at least one civilian and injuring three others, according to Tripoli Security Directorate.

The reasons for the clashes remain unknown, as southern Tripoli has been witnessing tensions and military mobilization between armed groups both outside and inside the city over the past few days.

Following the 2011 uprising that toppled former leader Muammar Gaddafi's regime, Libya has been suffering escalating violence and chaos, as well as political division.