A Facebook threat that referenced the Dead & Company concert at the XL Center in Hartford on Wednesday has city police and FBI investigating.

"This is the most significant threat that we’ve had to any event within the city of Hartford that I can recall where it was just blatantly put out there name date time location," Hartford Police Deputy Chief Brian Foley said.

The Facebook post was shared thousands of times, according to Harford police.

"It’s a real sad state of affairs that we have to worry about people taking guns in public places," Foley said.



Police said detectives and analysts from the Hartford Police Department Capitol City Command Center started investigating last week and they do not think the threat is credible.

The investigation is active and police believe the suspect is on the other side of the country. They said there is an active arrest warrant and the suspect also has a history of making similar threats toward public events.

Local investigators are working with federal authorities, including the FBI and out-of-state law enforcement and fusion centers.

While police said evidence suggests that the threat is not credible, there will be an increased presence at the XL Center tomorrow night for the show, which features Grateful Dead members Mickey Hart, Bill Kreutzmann and Bob Weir, as well as Connecticut native John Mayer.

"We’re aware of the situation and have been working closely with the proper law enforcement authorities to ensure that the appropriate measures and procedures are in place to safeguard all guests attending tomorrow's event. We ask that attendees arrive early and allow time for our security screening in order to enter the building in a timely manner prior to the show," Chris Lawrence, general manager, of the XL Center , said in a statement.

Undercover detectives will also be conducting covert operations throughout the area as well, police said.