In a statement, Paris prosecutor Laure Beccuau said the judge found there were grounds to formally investigate Durov on all the charges he was initially arrested for, writes Euronews.

French authorities late on Wednesday handed Telegram CEO Pavel Durov preliminary charges for allowing alleged criminal activity on his messaging app. He was released earlier in the day after four days of questioning, but has been barred from leaving France pending further investigation.

The co-founder of the messaging app was detained on Saturday at Le Bourget airport outside Paris as part of a sweeping judicial inquiry opened last month. Investigative judges filed the preliminary charges on Wednesday night and ordered him to pay €5 million bail and to report to a police station twice a week.

Allegations against the Russia-born Durov, who is also a French citizen, include that his platform is being used for child sexual abuse material and drug trafficking, and that Telegram refused to share information or documents with investigators when required by law.

The first preliminary charge against him was for “complicity in managing an online platform to allow illicit transactions by an organized group”, a crime that can lead to sentences of up to 10 years in prison and €500,000 fine, the prosecutor’s office said.