A New York Times analysis published Monday uncovered a “sprawling and interconnected movement intended to question the credibility of the presidential election, interfere with the voting process and potentially dispute the outcome.”

The network, spread across dozens of Telegram channels with more than half a million members, revealed an “increased sophistication of the election denialism movement,” the Times reported. Alarmingly, posts from election denier groups, the paper reported, trickled out to channels of extremist groups, namely the neo-fascist Proud Boys, who were instrumental in the Jan. 6 insurrection.

The Telegram channels uncovered by the Times included instructions for election deniers to query local officials in person about absentee ballots in New Hampshire, and go to election board meetings and argue for limits on absentee voting in Georgia.

One New Mexico channel urged people to record voting stations on camera, file police reports, and prepare to “fight like hell.”