U.S. seeks clarity from North Korea on uranium

SEOUL (Reuters) - North Korea's pursuit of a second path to nuclear weapons by enriching uranium is a problem likely to persist and Pyongyang needs to come clean about its intentions, a U.S. envoy for the reclusive state said on Sunday.

North Korea, which has produced enough plutonium for an estimated six to eight bombs, said on Friday it had made advances in uranium enrichment, a move analysts saw as a tactic to put pressure on regional powers after a month of conciliatory gestures.