United Nations human rights experts have called on Tehran to stop withholding healthcare from a jailed British-Iranian mother, as they warned the treatment may amount to torture.
Their pleas came as charity worker Nazanin Zaghari-Ratcliffe was expected on Wednesday to be in her third day of a hunger strike in protest over her treatment.
The 40-year-old, of Hampstead, north-west London, has spent more than 1,000 days in a Tehran jail after Iran publicly accused her of spying.
She is striking with a fellow inmate over their lack of access to proper medical care, which for Ms Zaghari-Ratcliffe includes the denial of a mammogram for lumps in her breasts.
Her husband, Richard Ratcliffe, also said she was "pushed over the edge" by an attempt by interrogators to pressure her to spy on Britain in return for her release from Evin prison.
Six UN experts reiterated calls for the pair's immediate release as they called on Tehran to give them medical access "in light of their serious health concerns".