CAIRO - At least four people were killed, including two policemen and 400 others were injured in clashes between the protesters and the security forces in Port Said in northern Egypt, an interior ministry official told Xinhua on Monday.

"Two policemen died of gunshot in clashes with protesters in front of Port Said Security Directorate," the interior ministry official source told Xinhua.

Port Said governorate has been witnessing civil disobedience for more than two weeks.

On Sunday, the protesters clashed with the police as the interior ministry decided to move 39 prisoners, who are awaiting a verdict over a tragic football riot which killed over 70 in February last year, to another prison in order to avoid unrest.

About 200 people of the prisoners' families gathered outside Port Said police department, hurling Molotov cocktails and fireballs at the building and setting fire to a police car, while the police responded with teargas to disperse the crowd.