(CNN) A couple camping at a national park in Kentucky said they were rousted from their tent by a man who told them he had seen a Bigfoot.

The man said he fired into the darkness after the ape-like monster that has never been proven to exist lunged at him, the couple told CNN on Wednesday.

Law enforcement rangers with the Mammoth Cave National Park r esponded to the incident involving the camper with the firearm at one of the park's backcountry campsites early Sunday, park spokeswoman Molly Schroer said in a statement.

The statement did not confirm a Bigfoot sighting but Schroer said no threat remains in the park.

Federal regulations prohibit the discharge of a firearm in the national park, she said. Park officials know the identity of the person who allegedly fired a weapon; no charges have been filed.