Police say an Afghan migrant has died and two others were injured following clashes at a camp near Athens, in the latest outbreak of violence involving migrants stranded in the European Union country.

Police said the man died in a hospital late Thursday after clashes involving dozens of mostly Afghan men at the camp where the city's international airport and a sporting complex for the 2004 Olympics were previously located.

About 57,000 refugees and migrants have been stranded in Greece since European countries closed borders to migrants earlier this year and the EU reached an agreement with Turkey to take back migrants reaching nearby Greek islands.

Violence has broken out at several camps in recent weeks, mostly at island facilities where migrants are awaiting deportation.