Her Iran-based family and legal team were on Saturday allowed a second in person visit with Mohammadi in her prison in northern Iran where "clear signs of a deterioration in her general condition were observed, and her physical state was described as critical", her foundation said in a statement.

The latest meeting came after an earlier visit in late March where it emerged that Mohammadi had suffered a heart attack earlier in the month.

The family reported after the latest visit that Mohammadi "has become extremely weak and has suffered significant weight loss", the statement quoted her Norway-based brother Hamidreza Mohammadi as saying.

He added that his sister was "being held in a cell with prisoners charged with murder and has been threatened with death by some of these inmates several times".

Mohammadi, who won the peace prize in 2023 in recognition of more than two decades of campaigning, was arrested on December 12 in the eastern city of Mashhad after speaking out against Iran's clerical authorities at a funeral ceremony.

In February, without prior warning, she was moved to a prison in the northern city of Zanjan and has only been allowed the most limited communication with her family, with concerns amplified by the US-Israel war against Iran which saw attacks on the city.

Mohammadi was arrested before protests erupted nationwide later in December 2025. The movement peaked in January, with authorities launching a crackdown that activists say killed thousands of people.

In February, she was handed a further six years in prison on charges of harming national security and a one-and-a-half-year prison sentence for propaganda against Iran's Islamic system. She also went on hunger strike for almost a week to protest her conditions of detention.

The foundation said in its statement the "continuation of this situation places Narges Mohammadi's life at immediate and irreparable risk".