Union flag protests: Two petrol bombs thrown in Belfast 22 December 2012 Last updated at 09:40 Two petrol bombs have been thrown at police in east Belfast following a loyalist flag protest. It happened on the lower Newtownards Road on Friday. There were no injuries. More than 30 loyalist protests took place in Belfast and in several Northern Ireland towns over the flying of the union flag on Friday. Most were relatively low key, and passed off without incident. A number of roads were blocked and bus services were suspended for a time in the city. Officers in riot gear used dogs to remove demonstrators from the Lower Newtownards Road. Two petrol bombs were thrown at police lines near Pitt Place. Police said the the main protest had dispersed when the petrol bombs were thrown. A PSNI spokesperson said they were thrown by a small number of people who had remained in the area. There were no injuries and no damage was caused.