Pavel Durov allowed to leave France, where he is under investigation over criminal activity on messaging app

Pavel Durov, the Russian-born founder and chief executive of Telegram, has returned to Dubai after authorities allowed him to leave France, where he is under investigation over criminal activity on the messaging app.

The billionaire, 40, was arrested at Le Bourget airport outside Paris last August. He was subsequently placed under formal investigation and banned from leaving the country, where he holds citizenship.