"I do not hesitate to say that this is a modern Dachau," Kouroumplis told journalists, adding that the refugees there are suffering as a result of some European countries' decisions to close their borders.
Europe has been beset by a massive refugee crisis, with hundreds of thousands of undocumented migrants fleeing their home countries in the Middle East and North Africa to escape violence and poverty. Many of them take the West Balkan route, which crosses Greece, using the county as an entry point into the bloc from which they travel onward to wealthier EU states where they intend to apply for asylum.
The situation with refugees in Greece has worsened after a number of Balkan states, including Serbia, Croatia and Slovenia, erected border fences and toughened their entry criteria.
According to the International Organization for Migration, since the beginning of 2016 nearly 155,000 migrants and refugees have arrived in Europe via the Mediterranean Sea, with nearly 144,000 coming through Greece.