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Iran arrested a prominent actor Saturday after she voiced support for the three-month-old protest movement triggered by the death of a woman in custody, the judiciary said Saturday.

Taraneh Alidoosti, 38, was arrested "by order of the judicial authority" as she "did not provide documentation for some of her claims" about the protests, reported the judiciary's Mizan Online news website.

It added "some figures and a number of celebrities" including Alidoosti have been questioned or arrested "following some baseless comments about the recent events and the publishing of provocative material in support of the street riots".

Alidoosti is best known for her role in the Oscar-winning 2016 film The Salesman.

Her most recent social media post was on December 8, the same day Mohsen Shekari, 23, became the first person executed by authorities over the protests.

"Your silence means the support of the oppression and the oppressor", read text on an image shared to her Instagram account.

Ìý"Every international organisation who is watching this bloodshed and not taking action, is a disgrace to humanity," Alidoosti wrote in the caption of her post.

The actor has been a prominent presence in Iranian cinema since she was a teenager. Recently, she starred in the film 'Leila's Brothers', which screened at this year's Cannes Film Festival.

Iran has been rocked by protests triggered by the 16 September death of Mahsa Amini, a 22-year-old Iranian of Kurdish origin, after her arrest for an alleged breach of the country's dress code.

On the day of Amini's death, Alidoosti posted a photo to Instagram with text saying: "Damnation to this captivity".

The caption to the post read: "Don't forget what Iran's women go through" and asked people to "say her name, spread the word".

On 9 November, she posted an image of herself without a headscarf, holding a paper with the words "Woman, life, freedom", the main slogan of the protests.

Hot on the heels of Shekari's execution, Iran publicly hanged protester Majidreza Rahnavard, 23, on December 12.

Nine other people arrested in connection with the unrest have been sentenced to death.

Thousands of people have been detained since the protests erupted and 400 have received jail sentences of up to 10 years for their involvement in the unrest, Iran's judiciary said Tuesday.