Faced with major ransomware attacks affecting critical industries, cybersecurity officials are asking companies and individuals to step up their safety practices.

Federal authorities have issued an advisory warning people of Medusa ransomware that has breached the data of more than 300 people since February.

The FBI and the US Cybersecurity and Infrastructure Security Agency are urging users of email services including Gmail and Outlook to protect themselves from Medusa. The agencies say attackers using the ransomware variant have hit hundreds of companies across multiple industries,