The suggestion a British-Iranian mother being detained in Iran may have been involved in a plot to overthrow the regime is "nonsense", her husband has said.
Charity worker Nazanin Zaghari-Ratcliffe, 37, from Hampstead, north-west London, was arrested at Imam Khomeini airport in April as she was trying to return to Britain after a holiday visiting family with her two-year-old daughter Gabriella.
Speaking on their seventh wedding anniversary, her husband Richard Ratcliffe told the BBC the accusations were false.
He said: "The idea that anyone with a baby could be busy overthrowing the regime is obviously nonsense."
He added: "There is definitely a political game going on between different parts of the Iranian government and the Iranian regime, so the revolutionary guard versus the government, and she's caught up in that.
"There have been various attempts by the Iranian government to improve relations with the West and this is almost as provocative as possible to stop that happening."
Earlier in August Prime Minister Theresa May urged the president of Iran to resolve the case during a phone call.
Gabriella is being cared for by relatives in Tehran but Mr Ratcliffe said being away from her was "tough".