Fighters of UN-backed government forces observe the eastern-based army in Southern Tripoli, Libya, on Jan. 12, 2020. Libya's UN-backed government and the eastern-based army on Sunday accused each other of breaching the cease-fire in southern Tripoli. (Photos: Xinhua)

A military vehicle of UN-backed government forces is seen in Southern Tripoli, Libya, on Jan. 12, 2020. Libya's UN-backed government and the eastern-based army on Sunday accused each other of breaching the cease-fire in southern Tripoli.

Fighters of UN-backed government forces are seen in Southern Tripoli, Libya, on Jan. 12, 2020. Libya's UN-backed government and the eastern-based army on Sunday accused each other of breaching the cease-fire in southern Tripoli.

Fighters of UN-backed government forces observe the eastern-based army in Southern Tripoli, Libya, on Jan. 12, 2020. Libya's UN-backed government and the eastern-based army on Sunday accused each other of breaching the cease-fire in southern Tripoli.

Fighters of UN-backed government forces are seen in Southern Tripoli, Libya, on Jan. 12, 2020. Libya's UN-backed government and the eastern-based army on Sunday accused each other of breaching the cease-fire in southern Tripoli.

Fighters of UN-backed government forces are seen in Southern Tripoli, Libya, on Jan. 12, 2020. Libya's UN-backed government and the eastern-based army on Sunday accused each other of breaching the cease-fire in southern Tripoli.