Saudi authorities have rolled out an electronic surveillance system for women, which tracks their movements and alerts their husbands by SMS when they attempt to leave the country.
The husband, who was travelling with his wife, received a text message from the immigration authorities informing him that his wife had left the international airport in Riyadh.
"The authorities are using technology to monitor women," said columnist Badriya al-Bishr, who criticised the "state of slavery under which women are held" in the ultra-conservative kingdom.
Women are not allowed to leave the kingdom without permission from their male guardian, who must give his consent by signing what is known as the "yellow sheet" at the airport or border.
Saudi Arabia implements electronic tracking system for women