The office of Istanbul’s chief prosecutor said it was probing the Thodex cryptocurrency exchange following complaints from users who could not access their assets.

Thodex owner Faruk Fatih Ozer deactivated his social media accounts and is believed to have fled Turkey for Tirana, Albania, Turkish broadcaster Haberturk reported.

Ozer could face possible charges of fraud and forming a criminal organization, Haberturk said, adding that a police cybercrimes unit searched Thodex’s Istanbul offices on Thursday. Meanwhile, the country’s financial crimes investigation agency blocked all Thodex’s funds, the state-run Anadolu Agency reported.