Protesters on Thursday fought running battles with police, torched vehicles and looted shops in Dublin, after three young children were injured in a knife attack outside a school. Police in riot gear stood guard on the streets in the Irish capital as crowds taunted them with chants and set off fireworks. Near O'Connell Bridge, over the River Liffey, flames rose from a torched car and bus, while crowds broke into stores and looted one of the city's main shopping streets.