A former Meta employee in the UK is under investigation after allegations that he illicitly downloaded about 30,000 private photos from Facebook. According to The Guardian, the accused developed a software program to evade Facebook’s internal security systems and access users’ private images. Meta uncovered the breach more than a year ago and referred the case to law enforcement, where it is now being investigated by the London Metropolitan police’s cybercrime unit.

“After discovering improper access by an employee over a year ago, we immediately terminated the individual, notified users, referred the matter to law enforcement and enhanced our security measures,” a representative from Meta told the publication. “We are co-operating with the ongoing investigation.”