U.S. President George W. Bush discussed by telephone with his Russian counterpart Vladimir Putin on Monday, urging the Russian leader to keep pressure on Iran over nuclear issue.
"President Bush reiterated the importance of continuing to apply pressure through the United Nations to insist on verifiable Iranian suspension of its nuclear enrichment activities," U.S. National Security Council spokesman Gordon Johndroe said.
Bush had the telephone discussion with Putin after the latter visited Tehran last week. Putin said during the trip that Moscow would not accept any military action against Iran.
Bush also claimed that he wants a diplomatic solution, but he has never ruled out military action if all else fails.
Bush told a news conference last week, "I've told people that, if you're interested in avoiding World War Three, it seems like you ought to be interested in preventing them (Iran) from having the knowledge necessary to make a nuclear weapon."
Washington accuses Iran of trying to develop nuclear weapons under the cover of a civilian nuclear program.
Iran, which always denies U.S. charges, insists that its nuclear program is for peaceful purposes only.