(CNN) Russia sought to interfere with US election systems during the 2018 midterm elections, a US official told CNN Wednesday.

The revelation comes on the heels of testimony earlier in the day from Army Gen. Paul Nakasone, chief of the US Cyber Command, who had alluded to a potential incident in testimony earlier in the day.

"US Cyber Command, working in partnership with the National Security Agency, provided indicators of compromise to the Federal Bureau of Investigation and the Department of Homeland Security," Nakasone told lawmakers on the House Armed Services Committee's Subcommittee on Cybersecurity in testimony Wednesday.

Nakasone also said Cyber Command moved "defensive teams" last November to three countries in Europe. The US official said the teams were sent to three Eastern European countries but declined to say which ones.

In December 2018, Director of National Intelligence Dan Coats said Russia, China and Iran sought to influence the midterm elections, but that the US had no intelligence reporting "that indicates any compromise of our nation's election infrastructure" that would have disrupted voting.

Read More