Amnesty International has accused a powerful armed group in Libya of what it describes as shocking crimes against migrants and residents of the capital, Tripoli.
The state-funded Stability Support Authority (SSA) has carried out unlawful killings, torture, forced labour and arbitrary detentions, it says.
The SSA was created under a decree by former Prime Minister Fayez al-Serraj in January last year.
Amnesty has written to the Libyan authorities demanding that its leader, Abdul Ghani al-Kikli, be removed from his position.
It says he has a well-documented criminal history.
Militia groups have held sway in many areas of conflict-plagued Libya since the ousting and killing of the country’s long-time leader, Muammar Gaddafi in 2011.