Thousands of rounds of ammunition were stolen at Oregon’s Crater Lake National Park — and the feds are asking for the public to help them find the culprits.

The rifle and pistol ammo was pilfered from a locked building in the park’s headquarters area, the Register-Guard of Eugene, Ore., reported.

The ammo was used as part of the park’s law enforcement program, according to the National Park Service. Its theft is a felony.

Authorities are offering up to $1,000 for information leading to the identification, arrest and conviction of those responsible for the theft.

Crater Lake National Park is located in the Cascade Mountains of southern Oregon. It’s known for its namesake Crater Lake, formed by the now-collapsed volcano Mount Mazama.