Three killed in U.N. helicopter crash in South Sudan

JUBA (Reuters) - Three crew members of a U.N. peacekeeping helicopter in South Sudan were killed on Tuesday when their aircraft crashed on a routine cargo flight, and a fourth crew member was being treated for injuries, the United Nations said.'

Russia's Interfax news agency said "preliminary information" indicated the helicopter, operated by a Russian firm, had been shot down as it flew over an area that has been a flashpoint during a civil conflict that is now more than eight months old.