US Secretary of State John Kerry
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Kerry: 'Real and substantial progress' on nuclear talks

US Secretary of State John Kerry has said "real and substantial" progress has been made in talks with Tehran about its nuclear programme.

Six world powers - the US, UK, Russia, China, France and Germany - have been meeting with Iran to try and get an agreement over curbing its nuclear programme in return for lifting sanctions.

The deadline for a deal has been extended to the end of June after talks in Vienna failed to reach a comprehensive agreement.

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