Facebook Inc said on Thursday it has dismantled three networks of fake accounts which could be used by Russia's intelligence services to leak hacked documents as part of efforts to disrupt the upcoming US election.

The company said the accounts, which it suspended for using fake identities and other types of “coordinated inauthentic behaviour,” were linked to Russian intelligence and people associated with a St. Petersburg-based organisation accused by US officials of working to sway the 2016 presidential vote...