French and Emirati spies hacked Telegram founder Pavel Durovs iPhone in 2017, The Wall Street Journalreported Wednesday, citing anonymous sources familiar with the matter.The joint spy operation code-named Purple Music reportedly stemmed from concerns about the Islamic States use of Telegram, a private messaging app, for recruitment and plotting attacks and came years before Durovs surprise arrest in Paris over the weekend.France had been pursuing a long-term effort to compromise Telegram, WSJ cited an unnamed former French intelligence official as saying, though they did not comment on the hacking of Durovs phone.It was not clear from WSJs reporting whether French President Emmanuel Macron was aware of the hack and whether the spies still had backdoor access to Durovs phone.The newspaper also said there was no indication that the hacking of Durovs phone played a role in his detention on Saturday.Politicoreported Tuesday that Macron was an early adopter of Telegram while French authorities were frustrated by the app because of its reluctance to cooperate.Durov, 39, was detained at Le Bourget airport outside Paris late Saturday on suspicion of 12 offenses related to failing to curb criminal content on Telegram.He is set to learn on Wednesday whether he will face charges and be remanded in custody.The Russian-born tech entrepreneur left Russia in 2014 after saying he facing pressure to share users' communications from his VKontakte social media platform with Russian security agencies.Despite his public break with Russia, he traveled to the country more than 50 times between 2015 and 2021, the IStories investigative outlet reported Tuesday, citing leaked FSB data.WSJ reported that Macron attempted to persuade the tech entrepreneur to move Telegram to Paris when the two had lunch together in the French capital in 2018.Durov ultimately decided to base Telegram in Dubai.He obtained both French and UAE citizenship in 2021, and Abu Dhabi invested $75 million into Telegram that year.