Hundreds of people have marched on Tehran’s Evin Prison to demand the release of a student activist who has been on hunger strike for 71 days.

Arash Sadeghi is serving a 19-year prison sentence in Iran for alleged conspiracy and propaganda against the state, but denies the allegations.

He began his protest after his wife, Golrokh Ebrahimi Iraee, was jailed for writing a story about stoning. Mr Sadeghi is one of eight prisoners said to be on hunger strike in Iran.

Concerns over his health have increased in recent days and on Friday he was the subject of an international Twitter campaign under the hashtag #SaveArash