In September 2019, the MENA Prison Forum (MPF) held a meeting in Tunisia that discussed the conditions of prison in North Africa. One of the panels was devoted to Libya and its different forms of incarceration that goes beyond the cells of the 'modern' state. MPF Libyan friends Muhannad Lamin, Marawan Tashani, Hassan Kadno, and Tarek Lamloum expressed their opinions about the various practices that can be described as 'prisons' in Libya. These range between enslavement of migrants from Sub-Saharan Africa, rape of children and wives of members of the militias in addition to violations committed against migrant workers. The discovery of several mass graves in Tarhuna, southeast of the Capital Tripoli, has been another empirical proof of the brutality of the Libyan civil war and its hidden terrifying layers. 

Sources: 
https://warontherocks.com/2020/07/tarhuna-mass-graves-and-libyas-internationalized-civil-war/
https://www.theguardian.com/world/2020/jun/13/mass-graves-found-in-libyan-town-recaptured-from-khalifa-hafter-forces;
https://www.africanews.com/2020/06/24/libya-exhuming-mass-graves-in-western-city-tarhuna//;
https://www.trtworld.com/africa/three-more-mass-graves-discovered-in-libya-s-tarhuna-37240;
https://mepei.com/libya-mass-graves-have-been-found-in-the-city-of-tarhuna/;
https://www.dailysabah.com/politics/9-more-bodies-discovered-in-mass-graves-in-libyas-tarhuna/news;
https://www.france24.com/en/20200611-un-horrified-by-reports-of-at-least-8-mass-graves-discovered-in-libya;
https://www.yenisafak.com/en/world/libya-9-more-corpses-found-in-mass-graves-in-tarhuna-3533176;