Mortar shelling by Khalifa Haftar's forces on Salah Al-Deen buildings has killed two girls and injured a third child - all siblings - identical sources reported on Tuesday.

The sources added that Haftar's forces shelling directly hit the family house in Salah Al-Deen, killing four-year-old Rawan and eight-year-old Jumana and inuring their brother Natheer with serious head injury, besides wounding the father and mother.

The shelling came after Haftar's forces had attempted to advance on Tuesday on Yarmouk Camp and Khallatat frontlines, yet failing to do so, they randomly shelled residential areas in southern Tripoli, the sources added.

This is the second crime against children in two weeks by Haftar's forces. The first was an airstrike on a house in Fernaj neighborhood in Tripoli that killed three girls and injured their fourth sister and their mother.

Meanwhile, Volcano of Rage Operation's media office said on Facebook that "warlord Haftar's militias and their mercenaries shelled the house in Salah Al-Deen at dawn."

It added that the shelling on Salah Al-Deen coincided with another mortar attack and two airstrikes on Tripoli's Mitiga Airport without causing any noticeable damage.