Pavel Durov, founder and CEO of messaging app Telegram, was arrested on Saturday night as he exited his private jet at France’s Bourget airport, French television network TF1 reported.

News of Durov’s arrests has sparked widespread discussion and speculation on social media, including Telegram itself, though it all appears to be based on French media. Neither Telegram nor a spokesperson for France’s national anti-fraud agency ONAF immediately responded to a request for comment.

According to TF1, Durov was facing an arrest warrant in France based on a preliminary police investigation. French authorities reportedly allege that Telegram’s lack of content moderation and unwillingness to cooperate with law enforcement makes Durov complicit in the drug trafficking, money laundering and sharing of child pornography allegedly taking place via the app.

Although born in Russia, Durov left the country in 2014 after resisting government pressure to release data on Ukrainian protest leaders from his former social network Vkontakte. Durov now lives in Dubai, where Telegram is based, and his plane is believed to have flown in from Azerbaijan.

Durov said last month that Telegram had 950 million active users, with a goal of reaching 1 billion this year. At the same time, the company claims it has just 30 engineers — a tiny team for an app of Telegram’s size, likely making Durov even more important to the company’s operations.