Kerman

Cities including Isfahan and Kerman have introduced bans in recent days, according to news agency AFP.

"The newly-renovated museum hopes to shake off some of this obscurity by inviting people to explore the history, culture and traditions of the Parsi community through the rare historical artefacts on display," says Kerman Fatakia, curator of the museum.

They have been charged with espionage, with Iranian state media reporting they were being held in the south-eastern city of Kerman.

A photograph was published of the couple, with their faces blurred, meeting the British ambassador Hugo Shorter at the public prosecutor's office in Kerman.

After staying in the cities of Tabriz, Tehran and Isfahan, accompanied by a tour guide, they travelled on to Kerman, in east-central Iran, but never checked into their hotel there.