The number of migrants crossing from Turkey to the Greek islands skyrocketed Tuesday, with 462 people arriving in the last 24 hours, the country's working group for the refugee crisis announced in Athens.
This is the largest registered number of refugees and migrants to enter the country in one day since the EU and Turkey implemented the refugee deal in April.
Under the scheme, one Syrian refugee is settled in Europe legally in return for every migrant taken back by Turkey from EU member Greece.
The average number of daily arrivals from Turkey over the past week was 74 people.
"We are observing this phenomenon and are in close contact with Turkish authorities," the working group said.
"Hopefully this has to do with the good weather and isn't a sign from Turkey's side," a coastguard officer told dpa.