Police in Aitoloacarnania, western Greece, arrested two men on Thursday, a 24-year-old Indian and a 26-year-old Pakistani national, suspected of raping and robbing a 16-year-old Pakistani migrant.
The victim told officers that the 24-year-old had told him to visit a stable in the area where he could find work.
After arriving at the site, he was allegedly immobilized by four men who struck him with a piece of wood and then sexually abused him.
He claimed they also robbed him of 500 euros.
Police said they are seeking the other two suspects and that the two detainees were in Greece illegally.
The victim will be placed in a welfare protection program for underage migrants.