RIYADH, Saudi Arabia -- RIYADH, Saudi Arabia (AP) — Activists have posted a video of a woman in Saudi Arabia driving a car, as their campaign urging women in the ultraconservative kingdom to defy a ban on getting behind the wheel kicks off.

A video posted Saturday on the official Arabic YouTube account of the driving campaign shows a woman identified as May Al Sawyan driving in Riyadh. She wears sunglasses and her hair is covered by the traditional black headscarf worn by Saudi women, but her face is otherwise visible.

In the run-up to the campaign, police warned that anyone disturbing public order would be dealt with forcefully. Ultraconservative clerics and have also warned against defying the country's driving ban on women.

The campaign for women to drive is a rare show of defiance in the kingdom.

Earlier on HuffPost:

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  • Saudi Interior Minister Nayef bin Abdul Aziz (C) attends the closing session of the 26th meeting of the Arab Interior Ministers Council in the Lebanese capital Beirut on March 23, 2009. (JOSEPH BARRAK/AFP/Getty Images)

  • Medina, SAUDI ARABIA: Saudi Deputy Foreign Minister for Security Affairs Prince Mohammed bin Nayef bin Abdul Aziz (R) holds the children of Saudi policeman Dhafir bin Abdullah al-Nafaai who was killed during a shootout in the Saudi holy city of Medina, 07 April 2007. (STR/AFP/Getty Images)

  • In this Wednesday, May 2, 2012 file photo, Saudi's Crown Prince and Interior minister, Nayef bin Abdul-Aziz, attends to the Interior ministers of the Gulf Cooperation Council "GCC" during their meeting in Riyadh, Saudi Arabia. (AP Photo/Hassan Ammar, File)

  • In this photo released by Saudi Press Agency, Saudi Interior Minister Prince Nayef bin Abdul-Aziz Al Saud, sitting center, prays with other Royal family princes during the funeral of his brother Saudi Crown Prince Sultan bin Abdul-Aziz Al Saud before special prayers at the Imam Turki bin Abdullah mosque in Riyadh, Saudi Arabia, Tuesday, Oct. 25, 2011. (AP Photo/HO)

  • In this photo released by Saudi Press Agency, Saudi crown prince Nayef bin Abdel-Aziz, right, welcomes Chinese Premier Wen Jiabao in Riyadh, Saudi Arabia, Saturday, Jan. 14, 2012. (AP Photo/HO)

  • Saudi special forces members of an anti-terror unit march on March 22, 2011 in front of portraits of Saudi King Abdullah ben Abdulaziz, second right, Crown Princes Sultan ben Abdulaziz, right, Nayef ben Abdulaziz, second left, and Prince Mohammed Ben Nayef, left, in the Dorma region, 100 kms west of the capital of Riyadh. (FAYEZ NURELDINE/AFP/Getty Images)

  • In this Monday, May 14, 2012 file photo, Saudi's Crown Prince - Interior minister Nayef bin Abdul-Aziz, right, and his brother Saudi defense minister Prince Salman bin Abdul-Aziz attend to welcome the Gulf Arab leaders as they arrive to the Saudi capital Riyadh to take part in the opening of Gulf Cooperation Council "GCC" summit, Saudi Arabia. (AP Photo/Hassan Ammar, File)