Eastern Libyan forces have carried out airstrikes on the southern part of Tripoli, making progress towards the city center. The latest attack came on Sunday, as the UN failed to achieve a truce between the UN-backed government and the eastern-based army. At least 21 have been killed and 27 wounded since last Thursday. That's when the eastern Libyan National Army, led by Khalifa Haftar, launched a campaign to take over western Libya. CGTN correspondent Adel El Mahrouky has more.

The tens of thousands of troops the LNA and others allied to Fayez al Sarraj, are definitely not enough to maintain a strong grip over that vast land. A war over Tripoli would greatly affect the fragile control both governments have on their territories.

KHALID MAHMOUD JOURNALIST, MIDDLE EAST NEWS AGENCY "The real battle for Tripoli hasn't started yet. The Libyan National Army hasn't used any real or extensive force. The generals in the LNA have full confidence that they can take over Tripoli. They seek to decrease the duration of the mission, because the longer it takes, the larger the losses are for both sides."

Fighters from both rival armies have rallied their arms around Tripoli, as fears of another civil war grow.

A war would drain the power of the rival Eastern and Western governments, threatening them of losing some territories.

Neither Sarraj nor Haftar that to happen.

KHALID ABDEL KHALIQ RESEARCHER OF MIDDLE EAST POLITICS "Haftar is just taking advantage of the instability in Algeria. Algeria has strictly objected to any military movement from Haftar. So the main purpose of this escalation is political gain. The continuation of both parties in this conflict depends on the political will of the countries supporting either side rather than actual forces on the ground."

ADEL EL MAHROUKY CAIRO, EGYPT "Libya is made up of numerous conflicting armed tribes. Whose loyalty sway according to their benefits. If Haftar proceeds to Tripoli violently, among the apparent resistance from his rivals, the general risks losing everything he has achieved. Continuing this display of power over Sarraj, however without direct military confrontation could bring him the loyalty of more tribes, and end upcoming dialogues in his favor. Adel El Mahrouky, CGTN, CAIRO."