Riot police in Athens fired tear gas to disperse hundreds of Muslims who pelted them with sticks and stones outside parliament on Friday, during protests over the destruction of a Koran by a Greek policeman.
The Muslim Union of Greece says an officer took a Koran from a customer at a Syrian-owned coffee shop, tore it up and stomped on it.
Bus stops and traffic lights were destroyed in Syndagma Square.
Police said 46 protesters were arrested. Seven Muslims and another seven policemen were injured and taken to hospital for treatment.
According to a police statement, about 75 cars, five stores and a bank were damaged.
It was the second protest since the reported incident. There was another on Thursday.