Officials said they responded just after 4:30 Monday afternoon for a call about a woman and two children, who were unresponsive in a car. They're saying someone who worked at the school found them. It was an administrative work day, no children were in school.
Police arrived on the scene, along with Washington County Emergency Services Special Operations Team. They've surrounded a silver SUV, where crime tape was surrounding the vehicle.
"There were no apparent signs of life on any of the children or the adult. And ambulance was called to the scene, confirmed that and pronounced them dead on the scene," said Chief Mark Holtzman with the Hagerstown Police Department.
Police say the woman is from the tri-state area but haven't determined if there's any connection between the woman and the school. And with no evidence of foul play, they say it'll be a challenge to figure out what happened.
"Determining cause of death is going to be difficult because they are no obvious signs of violence in this case. So detectives will be working hard with the medical examiners office to route out all the possibilities," said Holtzman.HPD will tow the SUV back to their headquarters where the Western Maryland Regional Crime Lab will examine the interior on Tuesday.
And as the investigation continued, neighbors gathered near the crime scene. Many wondering how something like this could happen so close to home.
"It kinda hits home and it's real close. You always see it on the news but never think oh man right here in our own backyard. So it's kind of crazy," said Brian Mills, neighbor and former Western Heights Middle School PTA President.
"We're not used to something like this going on and hopefully its the first and the last all in one,' said Brandi Goss, neighbor.
Police are calling this an isolated incident and they aren't searching for any suspects, and they believe the community is safe. But Chief Holtzman said his officers will work around the clock to figure out what happened.
"It's a shame, real sad day for the community to have something like this happen," said Holtzman. "And we're looking to get to the bottom of this and get some answers as I'm sure the community wants."
Police said they've identified the woman but they're working to notify next of kin before releasing any names. And they believe the two children found in the car were her own.
The bodies will be taken to the Medical Examiner's Office in Baltimore for autopsy.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.