The US has put a bounty of ten million dollars (9.2 million euros) on the head of a Russian hacker who is said to be behind thousands of cyberattacks around the world. Mikhail Pavlovich Matveyev was involved in attacks with the blackmail software LockBit, Babuk and Hive, said the Department of Justice in Washington on Tuesday. The targets of the attacks included American police authorities, but also schools and hospitals.

The hackers are said to have demanded a total of up to $400 million in ransom from their victims and captured up to $200 million in ransom, the ministry said. If Matveev is caught, extradited to the U.S. and tried, he faces more than 20 years in prison.

Just two weeks ago, the U.S. also promised a ten million dollar reward for information leading to the capture of suspected Russian cybercriminal Denis Gennadevich Kulkov. The man is said to be one of the heads of the Try2Check platform, which is used for credit card fraud.