Facebook says some groups tried to use its platform to sway the outcome of the U.S. presidential election.

In a case study of the 2016 presidential election, the company said it found several instances of "information operations," its term for governments and organizations who attempt to sway political opinion by spreading fake news and other nefarious tactics.

The case study was included in Facebook's white paper on "information operations." It also detailed ways it was combating "fake news" and other misinformation spread by adding new technologies and creating more security features.