Armed mob under guise of peaceful protest attacks U.N. in South Sudan

UNITED NATIONS (Reuters) - A mob of armed civilians pretending to be peaceful protesters delivering a petition to the United Nations in South Sudan forced their way into a U.N. base sheltering some 5,000 civilians on Thursday and opened fire, the world body said.

A U.N. source, speaking on condition of anonymity, said at least 20 people had been killed and 60 wounded in the attack on the base in Bor in northern Jonglei state, where there are Indian and South Korean U.N. peacekeepers. The source warned that the death toll was likely to rise.