"The U.S. may be using human rights to have leverage in the nuclear negotiations," he said.

Only a sustained, credible program of financial pressure and a human-rights campaign in tandem with nuclear negotiations will move the North to make difficult decisions".

Further, the members of the Security Council and Germany, which are engaged in nuclear negotiations with Iran, should include human rights concerns on their agenda.

The latest round of nuclear negotiations with North Korea will pause briefly this weekend after making little headway.

The dispute overshadowed the last round of nuclear negotiations, which ended in a stalemate in December.

In each case, the South Koreans were kept informed, the Americans say, although Seoul made no secret of its unhappiness over the nuclear negotiations.

He rejected nuclear negotiations last year.

He was also a key figure in the two-year nuclear negotiations with the EU trio.

Sonny boy," the admiral answered, tartly, "I was doing nuclear negotiations with the Russians when you were a gleam in your daddy's eye.

Europe and the Iranian nuclear negotiation: