Turkey's Prime Minister Ahmet Davutoglu hailed a "historic day" Friday as the European Union and his country agreed a deal to try and curb the flow of migrants to Europe at a Brussels summit.

"It is also a historic day because we reached a very important agreement between Turkey and the EU," Davutoglu said at a press conference.

"We today realised that Turkey and the EU have the same destiny, the same challenges and the same future."