Dozens of women have since driven through the capital Riyadh and other cities.
Saudi-based rights activist Eman al-Nafjan says police detained a woman Tuesday while driving in Jiddah on the Red Sea coast. Al-Nafjan says four other women accused of driving were later detained in the city.
Al-Nafjan spoke to The Associated Press on Wednesday. She says there has been no new information on the status of the detainees.