Police in Canada have arrested a person who is suspected of stealing customer information from around 165 companies that utilized cloud storage services from Montana-based Snowflake.

The person, Alexander “Connor” Moucka, was arrested on October 30 at the request of federal law enforcement in the United States, according to reports from Bloomberg and 404 Media, the latter of which disclosed several online identities purportedly used by Moucka and disclosed that the individual had been in contact with a reporter before going dark several weeks ago.

Moucka is suspected of carrying out a sophisticated cyberattack against Snowflake that opened the door for him to obtain vast troves of data from its clients, including customer records connected to AT&T, Ticketmaster, Advanced Auto parts, Santander Bank and a Lending Tree subsidiary business.

According to Google cybersecurity subsidiary Mandiant, Moucka is suspected of working with an American man named John Binns, who admitted to compromising servers used by T-Mobile and downloading a vast amount of the wireless company’s customer data. Binns was indicted in January; The Desk reported in May that he was arrested by law enforcement in Turkey.