A concerted Russian propaganda campaign helped spread fake election news and undermine the candidacy of Hillary Clinton, according to two research reports cited by the Washington Post.

Russia’s campaign include technology like botnets as well paid human trolls to spread false news, particularly about Clinton’s health and supposedly nefarious connections. The reports—one from the national security magazine War on the Rocks and another from the group PropOrNot—suggest a significant coordinated effort to undermine U.S. democracy and weaken Clinton.

Those allegations are part and parcel of broader allegations of Russian attempts to influence the election results including the hack and release of emails from the Democratic National Committee.