Rangers believe they have caught a grizzly bear that killed a man in Yellowstone National Park.

The man's body was found Friday near Lake Village after he went hiking alone off-trail, without bear spray.

The National Park Service hasn't released his name but says he was from Montana and was a five-year seasonal employee with a company contracted to operate medical clinics in the park.

Yellowstone spokeswoman Julena Campbell tells the Jackson Hole News & Guide that a trap set Friday caught an adult sow, but it didn't catch any cubs the attacking bear is believed to have had with her.

The sow is being kept alive while tests are done to confirm it was involved in the attack.

It is Yellowstone's first fatal bear encounter since 2011.