A mother’s call to police about her 19-year-old son’s growing stockpile of weapons, tactical gear, and online associates helped federal authorities uncover an alleged plot to attack President Donald Trump’s White House UFC event, according to newly unsealed affidavits identifying five suspects arrested in the case.

The filings identify California residents Michael Alan Thomas and Bryan Omar Roa, along with Ohio resident Tycen Proper, Missouri resident Daniel Eskridge, and Abraham Hermosillo Alvarez as the five men arrested after the FBI disrupted what officials described as a multiphase attack targeting Sunday’s UFC Freedom 250 event on the South Lawn of the White House. The federal complaint alleges one of the leaders of the group sought to “jumpstart” a revolution in the United States, with intentions of going after several Republican lawmakers.