SEOUL (Reuters) -- North Korea is willing to end its nuclear program and return to six-party talks on the issue if the United States reciprocates, Yonhap news agency quoted a North Korean official as saying on Tuesday. But he added Pyongyang was prepared to put nuclear warheads on missiles and conduct additional nuclear tests "depending on how the situation develops."

"We are still willing to abandon nuclear programs and return to six-party talks. We can do that any time only if the United States takes corresponding measures," it quoted the unidentified official as saying in a report from Beijing.