The UN mission in Libya condemned on Wednesday the indiscriminate shelling carried out by Haftar's militias against civilians in Tripoli.
In a statement, the mission said it was alarmed by the escalation of violence in Libya, particularly by the intensification of fighting in the past few days, resulting in civilian casualties.
It expressed concern that this would risk new waves of displacement.
The mission noted that it is following with grave concern allegations regarding violations committed in western coastal towns recently seized by the Government of National Accord (GNA) forces, including acts of retribution, looting, robberies, and torching of public and private properties,
"These allegations, if verified, would constitute grave violations of international human rights and humanitarian law," the statement reads.
"Acts of revenge will further escalate the conflict and lead to a cycle of revenge that threatens the social fabric in Libya," the mission warned.
It also called on the on parties to the conflict to deescalate, curb incitement, and immediately respect the repeated calls by the Secretary-General and international partners for a humanitarian pause.