Indonesia’s tax agency is investigating claims of a data leak affecting millions of taxpayers, including President Joko ‘Jokowi’ Widodo and his cabinet members.

Dwi Astuti, a spokesperson for the agency, said via text message on Thursday that “our technical team is conducting a deep dive” into the alleged leak.

These claims surfaced on social media platform X on Wednesday, indicating that around 6 million tax identification numbers were for sale on the hacking site BreachForums for 150 million rupiah (about U$10,000).

The alleged data breach reportedly includes personal information concerning Jokowi, his son VP-elect Gibran Rakabuming Raka, Finance Minister Sri Mulyani Indrawati, and other cabinet officials.

Indonesia has encountered serious cybersecurity challenges in recent months, including a major attack in June that disrupted over 280 government agencies.