Women's rights activists in Saudi Arabia appeared in a closed-door court hearing Wednesday on unknown charges after being detained in a crackdown last year, making their first appearance before a judge in a case that has sparked international outrage.

The arrests came just before Saudi Arabia began allowing women to drive, something women's rights activists had been demanding for years. The arrests showed that King Salman and his 33-year-old son, Crown Prince Mohammed bin Salman, are willing to crack down on any opposition even while courting the West.

It also was sandwiched between the mass arrest of businessmen in what authorities said was a campaign against corruption, and the killing of Washington Post columnist Jamal Khashoggi at the Saudi Consulate in Istanbul.

Saudi authorities did not respond to requests for comment Wednesday, and Saudi state media did not immediately report on the hearing.