Three people - two Greeks aged 58 and 49 and a foreign national, 35 - have been arrested in the northern port city of Thessaloniki on charges they held 11 migrants for ransom, including two minors, in a room on the terrace of an apartment building.
It was not immediately known how long the migrants had been held.
They were freed after a police raid on Thursday night.
Undeniably, the public sector is the most backward section of the Third Greek Republic. Digitized services are still in a primitive condition and state archives are not electronically backed up, while the current public accounting system functions under draconian logic. All these contribute profoundly to the socio-economic crisis' protraction.
Despite frustrations with the European Union, the government, the economy and immigration, the majority of Greeks are more likely to express empathy towards refugees than to blame them for their circumstances, according to a report by More in Common, an international non-profit organization with teams around the world.
By Marni Papamatthaiou
The viability of Modern Greek Studies programmes at universities around the world has been an issue for decades.
How can about 200 programmes for the teaching and dissemination of Greek language and culture - 65 of them incorporated in the classics departments of universities - survive when the Greek state does nothing whatsoever to support them?
There was a time when Modern Greek Studies at universities around the world were a top priority for every incoming Greek education minister.
Just after the turn of the millennium Modern Greek Studies Chairs were thriving at many universities internationally due to the trend of seeking out the sources of Greek culture.