Ransomware operators have delivered a stunning ultimatum to Washington, DC’s Metropolitan Police Department: pay them $50 million or they’ll leak the identities of confidential informants to street gangs.

Babuk, as the group calls itself, said on Monday that it had obtained 250GB of sensitive data after hacking the MPD network. The group’s site on the darkweb has posted dozens of images of what appear to be sensitive MPD documents. One screenshot shows a Windows directory titled Disciplinary Files. Each of the 28 files shown lists a name. A check of four of the names shows they all belong to MPD officers.