The founder and CEO of the messaging service Telegram was detained at a Paris airport on an arrest warrant alleging his platform has been used for money laundering, drug trafficking and other offenses, French media reported Sunday.

Pavel Durov, a dual citizen of France and Russia, was taken into custody at Paris-Le Bourget Airport on Saturday evening after landing in France from Azerbaijan, according to broadcasters LCI and TF1.

Investigators from the National Anti-Fraud Office, attached to the French customs department, notified Durov, 39, that he was being placed in police custody, the broadcasters said.

Durov’s representatives couldn’t be immediately reached for comment.

French prosecutors declined to comment on Durov’s arrest when contacted by The Associated Press on Sunday, in line with regulations during an ongoing investigation.

French media reported that the warrant for Durov was issued by France at the request of the special unit at the country’s interior ministry in charge of investigating crimes against minors. Those include online sexual exploitation, such as possession and distribution of child sexual abuse content and grooming for sexual purposes.

Telegram was founded by Durov and his brother in the wake of the Russian government’s crackdown after mass pro-democracy protests that rocked Moscow at the end of 2011 and 2012.

The demonstrations prompted Russian authorities to clamp down on the digital space, adopting regulations that forced internet providers to block websites and cellphone operators to store call records and messages that could be shared with security services.

In the increasingly repressive environment, Telegram and its pro-privacy rhetoric offered a convenient way for Russians to communicate and share news. In 2018, Russian media watchdog Roskomnadzor moved to block Telegram over its refusal to hand over encryption keys, but ultimately failed to fully restrict access to the app.

Telegram continued to be widely used — including by government institutions — and the ban was dropped two years later. In March 2024, Roskomnadzor said that Telegram was working with the Russian government to a certain extent and had removed more than 256,000 posts with prohibited content at Roskomnadzor’s request.

Telegram also continues to be a popular source of news in Ukraine, where both media outlets and officials use it to share information on the war, and deliver missile and air raid alerts.

In a statement posted on its platform, Telegram said it abides by EU laws including the digital services act, and its moderation is “within industry standards and constantly improving.”

Durov, the company added, “has nothing to hide and travels frequently in Europe.”

“It is absurd to claim that a platform or its owner are responsible for abuse of that platform,” Telegram’s post said. “Almost a billion users globally use Telegram as means of communication and as a source of vital information. We’re awaiting a prompt resolution of this situation. Telegram is with you all.”