The teenage children of imprisoned Iranian human rights advocate Narges Mohammadi have accepted this year's Nobel Peace Prize on her behalf. They read out her speech calling for international support for a movement in Iran that seeks to advance women's rights and freedom of speech.

Her 17-year-old twin children, Ali and Kiana Rahmani, received the diploma and gold medal at the Nobel award ceremony in the Norwegian capital, Oslo, on Sunday. Mohammadi is in an Iranian prison.

In her Nobel lecture delivered by the children, Mohammadi said, "The Woman, Life, Freedom movement...expedited the process of achieving democracy, freedom, and equality in Iran."

She said it has encompassed movements of women, youth, students, workers and others. The activist described it "a movement for fundamental change."

Mohammadi said Iranian civil society, "despite severe government repression, has continued to survive in various forms." She said, "Now is the time for international civil society to support Iranian civil society."

Mohammadi said, "The support of global public opinion through reputable international media will undoubtedly have significant effects on the continuity and strengthening of the democratic movement of the Iranian people."

The Norwegian Nobel Committee awarded the peace prize to Mohammadi "for her fight against the oppression of women in Iran and her fight to promote human rights and freedom for all."

Iranian authorities imprisoned Mohammadi on a number of charges, such as acting against national security.

But even while in prison, she aired her solidarity with massive women-led protests triggered by the death of Mahsa Amini in September of last year. The 22-year-old died in police custody after being arrested for allegedly wearing her headscarf improperly.

The Iranian government condemned the Nobel committee for selecting Mohammadi as the prize winner. It called the selection "biased and politically motivated."