HARTFORD, Conn. (AP) — A new state report says Connecticut's electric, natural gas and large water companies successfully fought off a growing number of sophisticated cyberattacks last year.

The Connecticut Critical Infrastructure 2018 Annual Report released Tuesday found utilities are spending more time, devoting more resources and educating their workforces to meet the increased level of threats. Electric utility Eversource, for instance, receives about 1 million threats a day from nation states and private actors.

The attacks range from attempting to compromise systems to phishing directed at employees.

Democratic Gov. Dannel P. Malloy, who has pushed for stronger cybersecurity measures in Connecticut, notes that challenges still remain and "we must continue to practice diligence."

Four utility companies participated in the security review, conducted by Connecticut's Public Utilities Regulatory Authority. Cable and broadband companies declined.