A grizzly bear has attacked and killed a cyclist only outside the Glacier National Park, authorities in the northern US state of Montana say.
The casualty was killed about a mile from a West Glacier campground on Wednesday.
The authorities say the bear is being searched for by armed police officers but gave no further details.
Bear attacks are uncommon in the area with just 10 deaths reported since the park was created in 1910.
The dead cyclist was a 38-year old policeman with the US Forest Service, Flathead County Sheriff Chuck Curry told Daily Inter Lake.com.
Officials say the grizzly confronted two cyclists on a trail after it was upset by them.
The bear took off the dead rider his saddle and the other rode off to get help.
The US Fish and Wildlife Service recently announced plans to remove grizzly bears in the threatened species list.