A bigger presence of relief agencies, U.N. workers and diplomats in Libya has done little to ease the plight of migrants abused in detention centers and blocked from crossing the Mediterranean, migrants and aid workers say.

Migrant boat crossings from Libya dropped steeply from mid-2017 due an Italian-led push to disrupt smuggling networks and boost Libyan coast guard interceptions.

Aid agencies have tried to partner with the internationally recognized Government of National Accord (GNA), which was set up in 2016, to help those stranded inside the country.