An emergency plan to evacuate refugees from dangerous prisons in Libya has stalled because European countries are taking too long to resettle them, the United Nations said on Wednesday.

The U.N. refugee agency (UNHCR) has flown more than 1,000 refugees from Libya, where many face rape and torture, to Niger since November to have their resettlement claims processed.

But the flights stopped last week because only 25 of those flown to Niger have so far been resettled in France, while the rest wait in the capital Niamey for European countries to accept and transfer them, it said.