The UN Special Adviser on Libya, Stephanie Williams, has said that the UN and international justice mechanisms have made significant efforts to investigate violations in Libya, including the mass graves in Tarhuna.

Williams made her remarks during a visit to Tarhuna on Tuesday. She was accompanied by officials from the Public Prosecution Committee and the Criminal Investigations Department.

 "..I saw the mass graves and inhumane solitary detention cells where hundreds of victims were tortured and killed," the UN Rep. stated on Twitter, noting that the Independent Fact-Finding Mission on Libya has made efforts to investigate violations and abuses of human rights throughout Libya.

Williams was shown around the mass grave and prisons used by the Kani militia, which was part of Khalifa Haftar's forces during his assault on Tripoli, and stressed the importance of ensuring that all human rights violations in the city are fully documented.

She also talked to relatives of the victims and reaffirmed the UN's support for their pursuit of justice, accountability, and an end to impunity.