Individual athletes who can prove they have not cheated could compete under the Olympic flag.

The United States will respond by September 1 to Russia's attempt to force a major reduction in American diplomatic staff, Rex Tillerson has said.

Iran’s president has proclaimed that a nuclear agreement is in reach, as a deadline looms for a preliminary accord.

Talks between Iran and a group of six nations over fears that Tehran’s nuclear programme might be used to make weapons appeared to run into trouble shortly after they began.