An EU-Turkey deal to tackle the migrant crisis has formally come into effect.
Under the deal, migrants arriving in Greece are now expected to be sent back to Turkey if they do not apply for asylum or their claim is rejected.
The influx of people crossing to Greek islands grew ahead of the deadline, and Greece said it would not be able to implement the deal immediately.
On Sunday, volunteers on the Greek island of Lesbos were dealing with the first arrivals under the new regime.
Just hours before the agreement came into force, a four-month-old baby girl drowned when a boat carrying migrants sank off the Turkish coast, Turkey's Anadolu agency reported.
The deal says that for every Syrian migrant sent back to Turkey, one Syrian already in Turkey will be resettled in the EU.
However, there were still many doubts about the implementation of the agreement, including how the migrants would be sent back.