Kohan wrote political commentary on her blog Roozmaregiha and contributed articles to Rooz Online, a Farsi- and English-language reformist news Web site. She was arrested along with her husband, Hojjat Sharifi, an activist with a university student association.
After her original blog, Roozmaregiha, was blocked by the government, she started a new one, Roozmaregiha2, in 2008.
Kohan and her husband were transferred to an undisclosed facility. She was allowed to contact her sister once for a few minutes, according to the reformist news Web site Mowj-e Sabz. No formal charges had been disclosed by late year.