German Chancellor Angela Merkel and top EU officials are visitinga migrant camp on the Turkish-Syrian border, as they seek to bolster a controversial EU-Turkey deal.
The delegation is inspecting living conditions at the Nizip camp, home to some 5,000 migrants.
However, rights groups have criticised the visit as "sanitised".
They also question the legality of the deal, which deports to Turkey migrants who do not obtain asylum in Greece.
They argue that Turkey is not a safe place to return people.
Satire rowMrs Merkel arrived in the southern city of Gaziantep, near the Syrian border. She was met at the airport by Turkish Prime Minister Ahmet Davutoglu.
They were joined by European Council President Donald Tusk and EU Commission Vice-President Frans Timmermans.