Pavel Durov, the founder and CEO of Telegram, said Monday he is back home in Dubai, United Arab Emirates, seven months after his arrest in France over charges the social messaging app was used for criminal activity.

Pavel Durov said that the investigation into illicit activity on the messaging app he runs is ongoing, but that he had returned home to Dubai.

Pavel Durov, the founder and CEO of social messaging app Telegram, has been allowed to fly home to Dubai as French authorities continue their unprecedented case against him. The tech billionaire was arrested in August after being accused of failing to properly moderate his app to reduce criminality.