Dual citizen Nahid Taghavi, 68, barely able to move, says activist Narges Mohammadi, who is incarcerated alongside her at Tehran's Evin prison

Daughter of Nahid Taghavi says her mother didn't complete her treatment, but that she is returning to Evin Prison 'with her head held high'

Foreign Office vows it'll continue to raise labor activist Mehran Raoof's case 'at the most senior levels'

Nahid Taghavi, 66, a human rights activist, was given 10 years for membership in an illegal group