Clashes break out in Northern Ireland

Violence has broken out in the city of Londonderry in Northern Ireland after thousands of protestors marched in the streets, to mark the annual Protestant Apprentice Boys parade.On Saturday, petrol bombs were thrown at police vehicles and around 100 dissident republicans staged protests during the city center parade which attracted 15-thousand people.The Apprentice Boys of Derry is a Protestant society which aims to commemorate the 16-89 siege of the city by King James the second.The annual parade has been a source of friction between loyalists, who want Northern Ireland to remain in the UK, and nationalists, who want a united Ireland.