ROSWELL, Ga. -- The FBI is awaiting lab results on what it says were components found to make a bomb.
The materials were found in a backpack left along a trail in the Chattahoochee River National Recreation Area near Vickery Creek in Roswell.
Police say Tuesday around noon a mother and daughter walking one of the trails saw the bag, took a look inside and called 911.
Police immediately closed off the park and called in the Cobb County bomb squad and the FBI.
Vickery Creek Trail is a national park, which is why the FBI was called in to investigate.
An FBI spokesperson said that the backpack had components used to make an improvised explosive device. Bomb technicians blew up the contents to "render them safe" and will now send what's left to a lab to be analyzed.
It's unclear whether the device was active and set to go off, or it simply contained components used to make a bomb.
There is no word on who left the backpack. The FBI is continuing to investigate.