Russian hackers targeted 21 U.S. states during election - U.S. official

A man holds a laptop computer as cyber code is projected on him in this illustration picture taken on May 13, 2017. REUTERS/Kacper Pempel/Illustration

WASHINGTON (Reuters) - Russian hackers targeted 21 U.S. states' election systems in last year's presidential race, a Department of Homeland Security official told Congress on Wednesday.

Jeanette Manfra, the department's acting deputy undersecretary of cyber security, would not identify which states had been targeted, citing confidentiality agreements. She reiterated that there was no evidence that any actual votes were manipulated.