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European Council President Donald Tusk is due to hold talks with Turkish President Recep Tayyip Erdogan to try to strengthen their joint approach to Europe’s migration crisis, the BBC reports.
Mr Tusk has raised the idea of “shipping back” migrants who arrive in the Greek islands from Turkey.
He said on Thursday that it could break the business model of people smugglers.
Mr Tusk has been engaged in intense diplomatic activity ahead of an EU-Turkey summit to be held on Monday.
French President Francois Hollande is also hosting the German Chancellor Angela Merkel in Paris on Friday to discuss the migration crisis.
Thousands of refugees and migrants are continuing to arrive on the Greek islands every day after setting off from the Turkish coast.
They aim to reach Germany and other countries in northern Europe but are finding their way blocked by increasing border controls.
More than 25,000 are now stranded in northern Greece on the border with Macedonia, raising fears of a humanitarian crisis.