An unknown man suffered serious injuries and was in coma at the Patra hospital following a gang attack on Sunday night, according to local reports.
The victim, who is said to be an "illegal" immigrant, was assailed by a group of men on motorbikes. He was rescued by people who were watching a play at a nearby theater.
Witnesses have identified one of the assailants as a local member of the far right Golden Dawn party, according to a local newspaper.