DUBAI, United Arab Emirates (AP) — An Iranian woman who removed her obligatory Islamic headscarf out of protest in December says she has been sentenced to 20 years in prison.

Shapark Shajarizadeh posted on her personal website that she had been jailed for “opposing the compulsory hijab” and “waving a white flag of peace in the street.”

There was no immediate comment from Iranian officials.

Police in Iran arrested 29 people in February for removing their headscarves as part of a campaign known as “White Wednesdays.” Nasrin Sotoudeh, a prominent human rights lawyer who represented Shajarizadeh and other women, was arrested last month.

Shajarizadeh, 42, was released on bail in late April. Her current whereabouts were unknown.

In Iran, women showing their hair in public face penalties ranging from a $25 fine to prison time.