Hundreds of migrants killed in new Mediterranean tragedy, says UN

At least 300 migrants are feared to have drowned after attempting to cross the Mediterranean Sea from North Africa this week in rough seas, the UN says.

UNHCR official Vincent Cochetel said it was a "tragedy on an enormous scale".

Survivors brought to the Italian island of Lampedusa said they were forced to risk the bad weather on ill-equipped vessels by human traffickers in Libya.

They were rescued from two of four dinghies that got into trouble after leaving Libya for Europe on Saturday.

The Italian coast guard rescued 105 people on Monday after one of the dinghies overturned but 29 died after spending several hours in the water.

Those rescued on Wednesday morning had spent days drifting without food or water in two of the other dinghies - with each said to be carrying more than 100 people.

The survivors said the fourth dinghy, carrying an estimated 100 migrants, disappeared at sea.

Carlotta Sami, a spokeswoman for the UNHCR, said the victims had been "swallowed up by the waves," with the youngest a child of 12.

'Too little too late'

"This is a tragedy on an enormous scale and a stark reminder that more lives could be lost if those seeking safety are left at the mercy of the sea," Mr Cochetel said in a statement.

The UN said the latest incident should be a message to the European Union that the current search and rescue operation in the Mediterranean was inadequate.

"Europe cannot afford to do too little too late," Mr Cochetel added.

In November, Italy ended an operation known as Mare Nostrum, which was launched in October 2013 in response to a tragedy off Lampedusa in which 366 people died.

The year-long operation was aimed at rescuing seaborne migrants, with Italian vessels looking for ships carrying migrants that may have run into trouble off the Libyan coast.

Late last year, the UNHCR warned that Italy's decision to end its operation in the Mediterranean would almost certainly lead to more deaths.

But other European countries, including the UK, said a rescue service for migrants could encourage them and so the operation was scaled down.

The EU now runs a border control operation, called Triton, which only operates close to Europe's coast and with fewer ships.