Greek police have found migrants hiding in a refrigerated truck during a routine check at a motorway in the north of the country.
The 41 migrants found inside were mostly Afghans.
The discovery comes less than two weeks after 39 bodies were discovered in the back of a refrigerated truck near London.
All believed to be Vietnamese migrants, two people have been charged in Britain and eight in Vietnam over the deaths.
The refrigeration system in the truck where the migrants were found in northern Greece had not been turned on.
And while none of the migrants were injured, some asked for medical assistance.
The driver has been arrested.
Greece is currently struggling with the biggest resurgence in arrivals of migrants and refugees since the 2015 migrant crisis.
Most of them are reaching Greek Aegean islands close to the Turkish coast via boats but a large number also come overland, using a river border crossing with Turkey.
Road accidents, mainly in northern Greece, involving migrants trying to cross into other countries have become more frequent in recent years.
Police have arrested dozens of people believed to be involved in human trafficking so far this year.