As a campaign for Saudi women to defy the driving ban in their country heats up, one of the country's leading female bloggers was detained in Riyadh on Thursday after a woman she was with did just that.

Eman al-Nafjan, who tweets as Saudiwoman and has been one of the leading voices urging Saudi women to get behind the wheel on October 26, was in a car that was stopped by police in Riyadh, the capital, as she filmed another woman driving. Al-Nafjan, who has been calling on Saudi women to upload videos of themselves driving in different parts of the kingdom, spoke exclusively with CNN on Friday about what happened.

"Yesterday, I kept getting called by women I know who wanted me to film them driving," she said, explaining how she spent most of the day filming and uploading information about those excursions online.

Read the exclusive CNN report here