Greece has sent a second group of migrants back to Turkey under a European Union deal with Turkey to exchange migrants for Syrians from Turkish refugee camps.
A Turkish ferry containing 45 migrants from Pakistan left the Greek island of Lesbos Friday, despite protests by human rights activists.
At least two activists were arrested after jumping into the water and clinging to the heavy chain connected to the ferry's anchor in an attempt to prevent the Turkish vessel from leaving.
Another group of about 80 migrants is expected to leave the island later in the day.
Greek authorities say the migrants deported had not applied for asylum in the European Union. The EU announced earlier this week that it would give all migrants facing deportation a chance to apply for asylum before being sent back to Turkey.