More than 700 Protestant rioters attacked police in Northern Ireland on Sunday with petrol bombs and missiles a day after 32 officers were injured in the worst riots in the British-ruled province for years. A police spokesman said cars had been hijacked and set alight and there were unconfirmed reports blast bombs had been hurled at police in east Belfast in attacks blamed on the Protestant Orange Order, which supports British rule in Northern Ireland. "Police have come under sustained attack," a police spokesman was quoted as saying by Reuters. "At least one police officer sustained injury when police lines were attacked with petrol bombs, paint bombs and other missiles."