DUBAI, United Arab Emirates (AP) — Iran has arrested Nobel Peace Prize laureate Narges Mohammadi, her supporters said Friday.

A foundation in her name said she was detained in Mashhad, some 680 kilometers (420 miles) northeast of the capital, Tehran, while attending a memorial for a human rights lawyer recently found dead under unclear circumstances.

There was no immediate comment from Iran over its detention of Mohammadi, 53. It wasn’t clear if authorities would immediately return her to prison to serve the rest of her term.

However, her detention comes as Iran has been cracking down on intellectuals and others as Tehran struggles with sanctions, an ailing economy and the fear of a renewed war with Israel. Arresting Mohammadi may spark increased pressure from the West at a time when Iran repeatedly signals it wants new negotiations with the United States over its nuclear program — something that has yet to happen.

Activist detained at ceremony for dead lawyer