The bodies of three migrants believed to have frozen to death were found in three separate Turkish border villages.
One victim was an Afghan national while the others remain unidentified. First examinations revealed that they had frozen to death.
An Afghan migrant, Jamaluddin Malangi, who was caught by Greek and Turkish authorities told journalists that Greece was sending back illegal migrants via small boats on the Maritsa river, which crosses both countries.
Malangi, who claimed he knew one of the migrants found dead, said that they sought help after crossing into Greece by knocking on doors.
"We wanted help and during this, someone must have called the police and the Greek police officers came and caught us. First, they took us to the police station then they took us near to the river where there were two boats," Malangi said.
"We were sent back after being put on them (the boats)" to Turkey, he added.
Migrants have been using the Aegean Sea route and land routes to cross into Greece.