At least one person was killed and several were injured during clashes at the Malakasa migrant camp, north of Athens, on Saturday.
According to the Athens News Agency, the man pronounced dead was a 31 year-old migrant from Syria.
There are unconfirmed reports of a second casualty.
Eight people have been rushed to the Evangelismos hospital in central Athens for treatment.
Police sources say the bloody clashes erupted between Afghan and Syrian refugees at the camp.
It is not clear what caused the clashes. Police officers are at the scene investigating the incident.