In addition, police on the Greek island of Lesbos, to where almost 30,000 refugees have arrived in the last two weeks, released all migrants from registration centers, citing insufficient funds to supply them all with food.
Greece, like many EU member states, is struggling to cope with a massive inflow of refugees from conflict-torn countries in the Middle East and North Africa.
In August, after the government headed by Syriza party leader Alexis Tsipras resigned, a draft presidential decree was announced to grant temporary asylum to thousands of refugees.
On Monday, shortly after Tsipras won the parliamentary election, the Hellenic Council of State, the supreme administrative court of Greece, deemed the August decree to be illegal, claiming that granting asylum to an undefined number of people without clearly determining the reason for asylum is against the country's law.