The FBI failed to inform scores of US government officials that Russian hackers had targeted their personal Gmail accounts even though they had evidence for a year of Moscow’s involvement, according to a report on Sunday.

Of the 80 people caught in the cross hairs of Kremlin-linked Fancy Bear, the cyber-espionage group behind the theft of data from the Democratic National Committee during the 2016 election, only two people said the FBI had reached out to them, the Associated Press reported.

“It’s utterly confounding,” Philip Reiner, a former senior director at the National Security Council, told the wire service after it notified him that he was on Fancy Bear’s radar in 2015. “You’ve got to tell your people. You’ve got to protect your people.”

The FBI would not elaborate on how the agency responded to the cyber-sleuthing campaign and provided a statement saying: “The FBI routinely notifies individuals and organizations of potential threat information.”

​But three people — including a current and former government official — told the AP that the FBI had been aware of Fancy Bear’s attempts to break into Gmail accounts for a year.

A senior FBI official said the sheer number of attempted hacks overwhelmed the bureau.

“It’s a matter of triaging to the best of our ability the volume of the targets who are out there,” he ​told the Associated Press.

Examining a list provided by cybersecurity firm Secureworks, the​ wire service identified more than 500 people or groups targeted by Fancy Bear and reached out to more than 90 of them. It eventually interviewed 80 of them.

​Only two said they learned of the hacking attempts from the FBI.

A few others were contacted by the FBI after their emails became public in the flood of releases during last year’s election hacking.

Charles Sowell, a former senior administrator in the Office of the Director of National Intelligence who was targeted two years ago, said the FBI should have been able to analyze the information and notify people at risk.

“It’s absolutely not OK for them to use an excuse that there’s too much data,” Sowell said. “Would that hold water if there were a serial killer investigation, and people were calling in tips left and right, and they were holding up their hands and saying, ‘It’s too much’? That’s ridiculous.”