A British-Iranian mother detained in Tehran is due to begin a three-day hunger strike in protest against being denied specialist medical care, BBC reports.
Nazanin Zaghari-Ratcliffe was jailed for five years in 2016 after being convicted of spying, which she denies.
Her husband, Richard Ratcliffe, said prison officials have refused to let her see a doctor to examine lumps in her breast and other health issues.
He said it was hoped the hunger strike would get them to take her "seriously".
Foreign Secretary Jeremy Hunt has praised her bravery and criticised Iran for - in his words - allowing an innocent mother to feel she needs to resort to a hunger strike.