Three members of the Libyan National Army (LNA), including two commanders, were killed late on Friday in a drone strike on Tarhuna city by the Government of National Accord (GNA), a military source said.
GNA's media office confirmed the strike and said "it targeted a control vehicle in Tarhuna."
Tarhuna, some 97.6 km southeast of Tripoli, is a hub allied to commander Khalifa Haftar's LNA.
LNA forces launched an offensive in early April to try take control of Tripoli from militias loyal to GNA leader Fayez al-Sarraj.
"Two commanders of LNA's ninth brigade and their assistant were killed in a drone strike," the military source told Reuters.