US backs NATO plan to blockade Libyan migrant route

The United States on Monday offered its backing for a NATO naval operation off the Libyan coast in support of a controversial Italian plan to close the Western Mediterranean migrant route to Europe.

"Barack Obama said he was willing to commit NATO assets to block the traffic in human beings and the people smugglers that we refer to as modern slavers," Italian Prime Minister Matteo Renzi told reporters after meeting the US President and the leaders of Britain, France and Germany in Hanover, Germany.

Italian defence minister Roberta Pinotti had earlier revealed that preparations for a naval blockade were already advanced, with approval expected when NATO leaders meet on July 7 in Warsaw.

US officials confirmed that Washington is fully on board.

The naval action envisaged is part of a broader Italian strategy to stop people using Libya as a launchpad for reaching Europe.

This will involve flying migrants with no claim to asylum back to their home countries, which will be paid to set up reception centres to reintegrate them.

Refugee and rights groups have slammed the plans, and the EU has also come under fire from Pope Francis for what the Catholic leader sees as an arbitrary distinction between asylum seekers and economic migrants.

Germany has said it supports naval action to combat trafficking of weapons as well as people, but wants it under EU rather than NATO command.

Aid organisations say over half the people arriving in Italy have a clear-cut right to refuge from persecution or conflict and many more deserve proper examination of their asylum applications.

Aid organisations say over half the people arriving in Italy have a clear-cut right to refuge from persecution or conflict and many more deserve proper examination of their asylum applications.

But this year's influx has been overwhelmingly from sub-Saharan Africa, a region the European Union considers safe for people to be returned to.

Under Italy's proposals, an existing NATO mission, Operation Active Endeavour, would be "recalibrated" into one overseeing the Libyan coast.

NATO's operation to stop migrant boats reaching the Greek islands from Turkey is the first of its kind for the alliance.

An operation off Libya would be more complicated given the presence in some coastal regions of Libya of Islamic State fighters.

Libya's fledgling administration, known as the government of national accord (GNA), last week offered to enter into a Turkey-style deal with Italy to take back migrants.

Such an accord had been seen as a distant prospect because of the rights and safety issues in the conflict-ridden North African nation.

Italy is preparing to lead a UN-backed peacekeeping force into Libya if and when the GNA has consolidated power sufficiently to be able to ask for outside help without facing a domestic rebellion.

The force, expected to involve 6,000 troops, will be charged primarily with training up Libyan security forces but will also be able to call on US warplanes and drones based in Italy for protection if required.

Agencies contributed to this report.