Facebook pledges tough U.S. election security efforts as critical memo surfaces

FILE PHOTO: Facebook logo is seen at a start-up companies gathering at Paris' Station F in Paris, France on January 17, 2017. REUTERS/Philippe Wojazer/File Photo

WASHINGTON (Reuters) - Facebook officials on Tuesday said the company is using a range of techniques including artificial intelligence to counter Russian operatives or others who use deceptive tactics and false information to manipulate public opinion.

The officials told reporters in a telephone briefing they expected to find such efforts on the social network ahead of the U.S. mid-term elections in November, but declined to disclose whether they have already uncovered any such operations.