A Saudi prince has issued a public call for women to be allowed to drive in the conservative kingdom.

Prince Alwaleed Bin Talal tweeted in Arabic and English: "Stop the debate: Time for women to drive."

His tweet included links to an opinion article arguing for the change which cited economic, social and religious considerations.

The billionaire does not hold a formal position in the Saudi government, but he leads the Riyadh-based investment firm Kingdom Holding Company, which holds stakes in several Western companies including Twitter.

Saudi Arabia follows an ultraconservative interpretation of Islam, and is the only country in the world that does not allow women to drive. Women's rights activists have been detained for defying the ban.