Iran deal 'a sign of hope for the entire world' - Mogherini

World powers have reached a deal with Iran on limiting Iranian nuclear activity in return for the lifting of international economic sanctions.

Negotiations between Iran and six world powers - the US, UK, France, China and Russia plus Germany - began in 2006.

Speaking at a joint news conference with European Union's foreign policy chief Federica Mogherini, Iran's foreign minister Mohammad Zarif called the agreement "historic", saying it opened a "new chapter of hope".