Hackers suspected to be working for the Russian government have been monitoring emails at the U.S. Treasury Department and a U.S. agency responsible for deciding policy around the internet and telecommunications, Reuters reported, citing people familiar with the matter.

“The United States government is aware of these reports and we are taking all necessary steps to identify and remedy any possible issues related to this situation,” John Ullyot, a spokesman for the National Security Council, said in a statement.