(CNN) Director of National Intelligence Dan Coats raised the alarm on growing cyberattack threats against the United States, saying the situation is at a "critical point" and coming out forcefully against Russia.

"The warning signs are there. The system is blinking. It is why I believe we are at a critical point," Coats said, addressing the Hudson Institute in Washington, DC, on Friday.

"Today, the digital infrastructure that serves this country is literally under attack," he said.

Coats compared the "warning signs" to those the United States faced ahead of the September 11 terrorist attacks.

"It was in the months prior to September 2001 when, according to then-CIA Director George Tenet, the system is blinking red. And here we are nearly two decades later, and I'm here to say, the warning lights are blinking red again," Coats said.

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