U.S elections: Agencies concerned about Russia, China, Iran interference

Some state and local governments, which run polling sites, have reported attempts to access their networks, but officials were able to "prevent access or quickly mitigate these attempts," the agencies said in a joint statement.

U.S. law enforcement and intelligence agencies said on Friday they remain concerned about attempts by Russia, China, Iran and other foreign groups to interfere with congressional elections next month and the presidential election in 2020.

The Office of the Director of National Intelligence, Justice Department, FBI and Department of Homeland Security said they do not have any evidence that anyone went far enough to prevent voting or change vote counts. Some state and local governments, which run polling sites, have reported attempts to access their networks, but officials were able to "prevent access or quickly mitigate these attempts," the agencies said in a joint statement.