Five world powers vow to prevent spread of nuclear weapons: Statement

Five global nuclear powers pledged Monday to prevent atomic weapons spreading and to ensure a nuclear war is never fought, in a rare joint statement ahead of a review of a key nuclear treaty later this year.

"We believe strongly that the further spread of such weapons must be prevented," said permanent UN Security Council members China, France, Russia, the UK and United States, adding: "A nuclear war cannot be won and must never be fought."