A political conference in Washington, DC, that bills itself as the alternative to the Trump-aligned CPAC was evacuated on Sunday after a death threat made against several of its speakers who have been critical of President Donald Trump.

Police say the threat was emailed just before 1p.m. Sunday, while the Principles First conference was going on inside.

The Principles First summit in DC — dubbed by some as the “Anti-Trump CPAC” — was interrupted by a bomb threat Sunday. The threat to the event came from an online poster with the moniker “Enrique T” — similar to the name of the ex-leader of the notorious Proud Boys,