Fort Worth area resident Lisa Brock-Piekarski is a little freaked out by images she discovered on an infrared camera mounted at her family's favorite hunting spot.

That's not because of the deer in the foreground but because of the mysterious lights in the background to the left of the animal.

"What I see looks almost like a Frisbee," Brock-Piekarski told Dallas-Fort Worth NBC affiliate KXAS-TV. "You see a several lights going around, and they're all symmetrical and lit up, and it just looks like an object in the sky."

While she hesitated calling it a UFO, Brock-Piekarski could not identify what might have caused the string of lights to appear in the photos, taken over a timespan of almost two hours.

"There's nothing back there but trees and sky," she said. "There's no hills, no buildings, nothing back there. It's all flat."