Libya’s self-declared government in control of the capital Tripoli has launched air strikes on Islamic State fighters in the city of Sirte, officials and witnesses said on Monday.

Officials said the late Sunday night attacks were on a building where fighters had gathered, but gave no details of casualties. Witnesses reported they were accurate and said wounded militants had been taken to hospital.

Fighters allied to Islamic State commanders in Iraq and Syria have been gaining ground inLibya, where two rival governments are battling for control and militants have taken advantage of the security vacuum. […]