The FBI is issuing a warning to police departments across the country including here in Western Massachusetts.
The bulletin warns of a Halloween revolt by a dangerous anarchist group known as the National Liberation Militia - warning local departments about the potential for attacks on their officers.
"Our guys are aware of it. They're much more observant, we're much more diligent, all police departments are, especially on Halloween," said Chicopee Police Officer Michael Wilk.
The sinister plot involves an anarchist group telling members to dress in costume, cause a disturbance and then ambush responding officers.
The FBI issued this statement to CBS News:
The FBI routinely shares information about potential threats to better enable law enforcement to protect the communities they serve. We urge the public to remain vigilant and report suspicious activity to law enforcement.
Local departments say regardless of the bulletin, there is no credible threat against police here but Halloween is always a time when more police are added to the streets to keep people safe.
"We're going to have walking patrols in certain neighborhoods, we're doubling up patrols where normally there's a one man police car we'll have two people in the car, things of that nature just to prepare for the night," said Springfield Police Sgt. John Delaney.
They don't want parents to be alarmed and say everyone should treat the day as planned with trick or treating and Halloween parties. If anything seems suspicious to immediately report it.
"We want people to be our eyes and ears so if they see something that is unusual...give us a call on 911 and let the professionals check it out," Delaney said.
"Every Halloween, at our department we add extra manpower and extra patrols. Our guys stay a little more observant," Wilk said.
Chicopee police also advise taking Halloween masks off while going into stores or driving to keep everyone involved safer.
Multiple communities plan on adding more walking patrols and being visible in their neighborhoods.
Copyright 2015 Western Mass News (Meredith Corporation). All rights reserved.