In a column published in the pan-Arab daily Asharq al-Awsat the day of his arrest, al-Mubarak said extremists are intimidating people from exercising their rights. He said the courts in Saudi Arabia do not have sufficient provisions to deter those who threaten and terrorize others from exercising their freedoms because "rights and freedoms ... are not instilled in our culture, nor our interpretation of religion."
Al-Mubarak, who also works as a schoolteacher, was among a core group of active young Saudis calling for women's right to drive.
Around 60 women claimed they got behind the wheel Saturday to oppose the ban. The campaign sparked protest by the kingdom's ultraconservative religious establishment.
The reformers behind the Oct. 26 driving campaign say their efforts are ongoing and that they continue to receive videos by women filming themselves flouting the driving ban.
The activists told The Associated Press that they have been followed for the past several days and are anticipating arrest. They have put in place contingency plans and emergency numbers for journalists and rights organizations to call in case they are detained.
At least two women have been fined recently by police for driving, the activists said. Samia El-Moslimany said she was given a nearly $135 fine for driving in the kingdom, though she has a U.S. driver's license.