The FBI is investigating the alleged Russian hacking of the U.N. cybersecurity agency and a U.K. firm that provides information technology services, according to people familiar with the matter.

The people spoke on condition of anonymity because they were not authorized to publicly discuss the matter publicly.

The investigation is being led by the FBI and the Department of Homeland Security’s cybercrime division, which is also involved.

The FBI declined to comment on the matter and referred questions to Homeland Security.

The U.R.S., an umbrella organization that includes the U., NATO, NATO Allies, and the United Nations, is one of several countries, including Britain and France, that have been probing Russian interference in the 2016 presidential election.

The cyberattacks, including a campaign to damage the U, the U and NATO networks, were carried out by the Kremlin-linked FSB.

The agency did not immediately respond to a request for comment on Tuesday.

U.s. officials said Tuesday they believe that Russia hacked the UNAIDS and the Center for the Prevention of Cyberattacks on April 4, which led to a series of diplomatic and financial setbacks for the U’s ally, Russia.

The White House, which has blamed the hacking on Russia, has blamed other nations, including China and Iran.

The Obama administration has warned that Moscow’s cyberattacks are designed to undermine U. S. security.

The Russian government has denied the accusations.

The Kremlin-aligned FSB, which also has ties to the Kremlin, has denied that it hacked the United States or that it interfered in the election.

But the UR., which includes Russia and other nations such as China and Syria, has accused the U to be the source of the cyberattacks.

“The U.A.E. has been the target of Russian cyberattacks and its hacking capabilities are widely known,” the URT said in a statement.

“Our main concern is that the URA, an entity with an extensive network of cyber-espionage and espionage capabilities, has not taken appropriate steps to combat these attacks.”

U. Russia has accused U. N. of “providing a platform for illegal cyber-attacks” on its territory and has accused it of using cyber-spying and other forms of cybercrime.

UNAID, the United Nation’s umbrella organization, has been attacked by other nations including China, which the UA.

S.-based agency says hacked its email, banking and other systems, and Iran, which cyberattacks it and others have blamed for hacking U. states and the UAP.