Reports are emerging on social media of missile attacks in Libya killing civilians in residential areas of Tripoli.
Reports on Twitter from people on the ground say several people have been killed and houses struck. Details are scarce and unconfirmed.
Libya has been gripped by conflict since Colonel Muammar Gaddafi was toppled in 2011.
The country is divided into areas under different control.
In the past two weeks eastern Libyan commander Khalifa Hifter's Libyan National Army (LNA) has advanced to the capital, Tripoli.