Iran nuclear talks: Doubts over deal as deadline looms

Doubts are growing that Monday's deadline for a deal on Iran's controversial nuclear programme will be not met at talks in Vienna in Austria.

Both the US and Germany said sides were working to close "big gaps", with some suggestions that the deadline could be extended.

Six world powers want Iran to curb its nuclear programme in return for the lifting of United Nations sanctions.

Bethany Bell reports from Vienna.