Telegram boss Pavel Durov under formal investigation on Wednesday in a probe into organized crime on the messaging app, but granted the entrepreneur bail on condition he pays 5 million euros, reports twice a week to police and does not leave French territory.
Paris prosecutor Laure Beccuau said in a statement the judge found there were grounds to formally investigate Durov on all the charges for which he was initially arrested four days ago.
They include suspected complicity in running an online platform that allows illicit transactions, images of child sex abuse, drug trafficking and fraud, as well as the refusal to communicate information to authorities, money laundering and providing cryptographic services to criminals.
Durov's lawyer did not immediately respond to a request for comment.
Being placed under formal investigation in France does not imply guilt or necessarily lead to trial, but indicates judges consider there is enough evidence to proceed with the probe. Investigations can last years before being sent to trial or shelved.
The judge's decision came after Russian-born Durov was arrested at an airport near Paris on Saturday evening.
Durov's detention has fuelled debate on where freedom of speech ends and enforcement of the law begins. It also underlines the uneasy relationship between governments and Telegram, which has close to 1 billion users, while serving as a warning shot to tech titans who refuse to comply with authorities over alleged illegality on their platforms.
Russian state news