the 31 migrants were on Tuesday night taken in cold room on a truck at the border between Germany and the Czech republic.
It was stated by a spokesman for the federal bureau of investigation in Germany on Wednesday, according to the German news agency dpa.
the Police have not given any reports about whether some of the migrants have come to harm.
the Migrants were found during a check of the police and customs authorities by the German-Czech border.
It's being investigated still, how long migrants have stayed in the cold, and where they were shipped from.
the Truck, which is registered in Turkey, had its course against the Dredsen, when the on Tuesday evening were stopped.
The 57-year-old Turkish driver has been arrested under suspicion of trafficking in human beings.
According to the police, the 31 migrants, all men aged 18 to 47 years. 24 of them are Turkish nationals.
Among them were also three syrians, three iranians and one iraker.
the Men in the truck were stored on top boxes of frozen fruit with less than a meters distance to the roof, writes the German media Bild.
the Traffickers stores regularly migrants in trucks to carry them up through Europe. Some times with fatal consequences.
In 2015, were the bodies of 71 migrants found in Austria in a closed truck, which was driven from Hungary.
In October last year were 39 vietnamese also found dead in the cold on a truck in the Uk, after they had been smuggled in from Belgium.