A British-Iranian charity worker jailed for espionage in Iran has to return to prison after a three-day release expired, her husband said Sunday, according to the Press Association.

Nazanin Zaghari-Ratcliffe has been in Iranian prison on espionage charges since 2016, when she was detained for allegedly conspiring to overthrow the regime by running a journalism training programme while visiting Iran to introduce her young daughter to her grandparents. 
There had been some hope after her Thursday release that Iranian officials were clearing the way for the dual national to return to her residence in Britain, where her husband has been working for her release.
Iran does not recognize dual nationality and has been treating her solely as an Iranian citizen in the case.
In a statement, her husband, Richard Ratcliffe, said his wife had been told by Iranian authorities she needed to be back in prison by sunset.
"After discussion with her family in Iran, Nazanin decided that she would go into prison. She did not want to be dragged out of the house in front of her baby, but would walk into prison with her head held
high.
"She wanted to say goodbye to Gabriella calmly and left her in the care of her mother. Her father has taken Nazanin back to prison."
The couple's child is four and has been in the care of her grandparents since Zaghari-Ratcliffe's incarceration.
Zaghari-Ratcliffe, a project manager for the Thomson Reuters Foundation, was sentenced to jail for five years in 2016. She denies the charge that she was running a journalism training programme.