OK, Trump supporters. It's time to make sure your fire extinguishers are fully charged and your fire insurance is up to date!

WMUR NH reports that locals who display Trump signs on their property are receiving menacing letters from anonymous sources, threatening to burn down their homes if Trump is not ousted.

"Dear neighbor," the letter politely begins. "You have been identified by our group as being a Trump supporter. Your address has been added to our database as a target when we attack should Trump not concede the election. We recommend that you check your home insurance policy and make that it is current and that it has adequate coverage for fire damage. You have been given ‘Fair Warning."

"Always remember, that it was 'you' that started this civil war."

Letters have been confirmed in at least two different towns in New Hampshire, and are purportedly popping up elsewhere, including Kansas City and communities in Maryland, as well.

"I was kind of quite shocked that anyone would send a letter out with that type of threat," said Brookline Police Chief Bill Quigley, suggesting it's "on a felony level … something on the federal level."