Follow CBSMIAMI.COM: Facebook | Twitter

FT LAUDERDALE (CBSMiami) – Lake Worth city officials are investigating how a power outage triggered a zombie alert to be sent out to residents on social media.

READ MORE: Lawyer For Teen Shot By Miami-Dade Police Sergeant Calls It Unjustified

It happened early Sunday morning and made a reference to a fictional town in AMC’s “The Walking Dead.”

READ MORE: Broward Sheriff's Deputies Chase, Crash In Lauderhill Sends Four To The Hospital

“Power outage and zombie alert for the residents of Lake Worth and Terminus. There are now far less than 7-thousand 3-hundred 80 customers involved due to extreme zombie activity. Restoration time uncertain.”

Well, the power was back on in about half an hour.

MORE NEWS: Coast Guard Searching For Nearly 40 People After Boat Capsizes Off Florida Coast

The city has apologized for the message that may have frightened some residents. Officials are now looking into how the message was altered and who is responsible. They add that they currently have no zombie activity.