Hackers who targeted the federal government appear to be part of a Russian intelligence campaign aimed at multiple U.S. agencies and companies, including the cybersecurity company FireEye, officials said Sunday.

A Commerce Department spokesman confirmed a breach, saying it occurred at an unidentified bureau.

Department officials alerted the FBI and a cybersecurity agency within the Department of Homeland Security, the spokesman said, declining to comment further.

The White House National Security Council also confirmed that it was looking into another potential intrusion at the Treasury Department after Reuters reported that foreign government-backed hackers accessed internal government emails.

The Washington Post first reported that the hacks were carried out by Russia’s Foreign Intelligence Service, or SVR.

Among the SVR’s targets was FireEye, a major U.S. cybersecurity company with extensive government contracts, The Post reported. The company’s CEO said last week that it had been hacked “by a nation with top-tier offensive capabilities.”

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