The Greek league football game between Olympiakos Pireausand Panathinaikos was abandoned after violence erupted between fans and police on Sunday, it has been reported.

The clashes began when hundreds of youths without tickets tried to enter the stadium before the game started. The conflict was continuing throughout the match, forcing the second half of the match to be started 35 minutes late, reported the Associated Press.

The fans of the visiting team Olympiakos were not allowed to enter the stadium under their policy for fear of violence between the fans of the two teams. Olympiakos were leading with 1-0 from Djamel Abdoun's 51st-minute goal.

Panathinaikos fans started throwing petrol bombs and setting fire to sections of stands, which prompted referee Tassos Kakos to abandon the game. Three fire trucks were called in to extinguish flames. More than 50 people have been arrested and several police officers were injured, reported Reuters.

"I would have liked to talk about a great derby but unfortunately I can't because this didn't happen," Reuters quoted Panathinaikos' coach Jesualdo Ferreira as saying.

"As a professional I feel very sorry for what I saw and as a person who loves Panathinaikos, I certainly don't understand it," he added.

According to league rules, if a match is abandoned due to crowd trouble, the offending team will face a penalty include 0 point from that game, a fine ranging from 120,000 euros - 180,000 euros as well as point deductions, a Reuters report said.

Panathinaikos will face a disciplinary hearing on Tuesday.