A court in Libya's capital sentenced a son of Moammar Gaddafi to death in absentia on Tuesday over killings during the country's 2011 uprising.

The Tripoli court that sentenced Seif al-Islam, who is being held by a militia that refuses to hand him over to the central government, also sentenced to death eight others, including former Libyan spy chief Abdullah al-Senoussi. It was unclear whether the sentences would be carried out.

Libya has slid into chaos since the overthrow and killing of Gaddafi. It is now bitterly divided between an elected parliament and government cornered in the country's east, with little power on the ground, and an Islamist militia-backed government in the west that has seized Tripoli.

Since the end of the civil war, Seif al-Islam has been held by a militia in Zintan, which is allied with the Tobruk-based internationally recognized government against the Tripoli one. He is also wanted by the International Criminal Court in The Hague on charges of crimes against humanity.

Charges in the trial included recruiting mercenaries who were given Libyan nationality, planning and carrying out attacks on civilian targets from the air, forming armed groups and shooting into crowds of demonstrators.

Hundreds of militias in Libya are battling for power and turf in a lawless environment has allowed human traffickers and kidnappers to flourish.

The U.N. envoy for Libya, meanwhile, has urged the Islamist-led government in Tripoli to sign a peace deal that would establish a unity government. Members of the Tobruk government and regional leaders signed the unity accord in Morocco on July 11.