Pavel Durov, the chief executive of Telegram, has been charged with allegedly allowing criminal activity on the messaging app.

French judges have barred Mr Durov from leaving France pending further investigation, but he has avoided being held in custody with a €5m bail.

The billionaire was arrested in France on Saturday after his private jet landed at Le Bourget airport outside Paris.

The Russian-born entrepreneur – who became a French citizen in 2021 – is accused of operating a platform which is being used for child sexual abuse material and by organised crime gangs, for drug trafficking and fraud.

Telegram has insisted it abides by EU laws and its moderation is “within industry standards and constantly improving”.

Its statement added: “It is absurd to claim that a platform or its owner is responsible for abuse of that platform.”

Mr Durov’s arrest in France, and four days of questioning, has caused outrage in Russia.

Paper planes – representing Telegram’s logo – haver been placed in Moscow in support of the billionaire.

Some government officials claim his detention was politically motivated and proof of the West’s double standard on freedom of speech.

Kremlin spokesman Dmitry Peskov told reporters on a conference call that Russia was ready to provide Durov with all necessary assistance given his Russian citizenship, but that his French citizenship complicated the situation.