Geneva: The European Union's policy of helping the Libyan authorities intercept migrants in the Mediterranean and return them to "horrific" prisons in Libya is "inhuman", the United Nations said on Tuesday.
"The suffering of migrants detained in Libya is an outrage to the conscience of humanity," the UN human rights chief Zeid Ra'ad Al Hussein said in a statement.
"The European Union's policy of assisting the Libyan Coast Guard to intercept and return migrants in the Mediterranean (is) inhuman," he said.
Chaos-ridden Libya has long been a major transit hub for migrants trying to reach Europe, and many refugees and migrants have fallen prey to serious abuse there at the hands of human traffickers and others.
Zeid warned today that an already dire situation in the country "has now turned catastrophic."
"The detention system for migrants in Libya is broken beyond repair," he said, adding that "the international community cannot continue to turn a blind eye to the unimaginable horrors endured by migrants in Libya, and pretend that the situation can be remedied only by improving conditions in detention."
The UN rights office condemned the EU and Italy for helping the Libyan coast guard intercept migrant boats in the Mediterranean, despite concerns that this could condemn more migrants to detention, exposing them to torture, rape and forced labour.
"Those detained have no possibility to challenge the legality of their detention, and no access to legal aid," today's statement said.
According to Libya's Department of Combatting Illegal Migration (DCIM) 19,900 people were being held in facilities under its control in early November, up from about 7,000 in mid-September.
The huge hike came after authorities detained thousands of migrants previously held by smugglers in the Libya's people-trafficking hub Sabratha, to the west of Tripoli.
"The increasing interventions of the EU and its member states have done nothing so far to reduce the level of abuses suffered by migrants," Zeid said, adding that his agency's monitoring of the situation instead showed "a fast deterioration in their situation in Libya."
He said staff members had visited four DCIM facilities earlier this month and were "shocked" by what they saw.
There were "thousands of emaciated and traumatised men, women and children piled on top of each other, locked up in hangars with no access to the most basic necessities, and stripped of their human dignity," he said.
"We cannot be a silent witness to modern day slavery, rape and other sexual violence, and unlawful killings in the name of managing migration and preventing desperate and traumatised people from reaching Europe's shores," said Zeid.