U.S. and British officials have accused four Russian officials — including hackers with a Moscow intelligence agency — with various cybercrimes committed over a period of several years against more than 100 countries, including the United States.

The U.S. Justice Department and British Foreign Office announced the cybercrimes on Thursday. They say the Russian officials worked with the Kremlin to conduct cyber intrusions between 2012 and 2018 that targeted the global energy sector in about 135 countries.

The department said the attacks came as part of two separate conspiracies targeting “thousands of computers, at hundreds of companies and organizations” over the six-year period.