The FBI and the U.S. Cybersecurity and Infrastructure Security Agency are urging users of popular email services like Gmail and Outlook to be on the lookout for a dangerous and potentially costly ransomware scheme. A bulletin released this week detailed a warning for the Medusa ransomware gang, a group that’s been active since 2021.

The FBI has issued a warning about ransomware threats targeting the United States Postal Service and Gmail and Outlook users. According to the agency, the Medusa ransomware gang—an organization that has been active since 2022—is behind the attacks.

The FBI and US Cybersecurity and Infrastructure Security Agency (CISA) have issued a warning about the Medusa ransomware, which has hit hundreds of victims.

Earlier this week, the FBI and U.S. Cybersecurity and Infrastructure Security Agency released an advisory alerting users of popular email services like Gmail and Microsoft Outlook of the Medusa ransomware gang, which has infected more than 300 organization across the country in recent years.

People who use popular email services like Gmail and Microsoft Outlook should beware the Medusa ransomware scheme that tries to extort private information.

Medusa demands a ransom payment of thousands alongside a threat of releasing embarrassing information to the public.