The Justice Department on Friday charged a Russian woman with election interference just as top U.S. intelligence and law enforcement agencies warned that Russia, China, and Iran are running influence campaigns seeking to sway American voters in the 2018 midterms and the 2020 presidential campaigns.

“We are concerned about ongoing campaigns by Russia, China and other foreign actors, including Iran, to undermine confidence in democratic institutions and influence public sentiment and government policies,” said the statement issued jointly by the Office of the Director of National Intelligence, the Justice Department, the FBI, and the Department of Homeland Security. “These activities also may seek to influence voter perceptions and decision making in the 2018 and 2020 U.S. elections.”

The campaigns include “using social media to amplify divisive issues, sponsoring specific content in English-language media like RT and Sputnik, seeding disinformation through sympathetic spokespersons regarding political candidates and disseminating foreign propaganda,” the statement said.

Election infrastructure itself, including voting machines, election tallying computers, and voter databases, were unlikely to be directly affected, the agencies said.

“Currently, we do not have any evidence of a compromise or disruption of infrastructure that would enable adversaries to prevent voting, change vote counts or disrupt our ability to tally votes in the midterm elections,” the statement said.