A cougar
© DreamstimeA cougar
A mountain lion attacked two bikers, leaving one dead Saturday, according to King County Sheriff's officials.

See a photo of the mountain lion here (WARNING: Graphic).

Emergency crews responded to a report of a mountain lion attack in the foothills near North Bend around 11:20 a.m. Saturday, Eastside fire officials said.

A cougar killed one man, 32, and injured another when it attacked in Washington State
A cougar killed one man, 32, and injured another when it attacked in Washington State on Saturday morning
#Breaking Eastside Fire Fighters are responding for a mountain lion attack in the foothills outside of North Bend. โ€” Eastside Firefighter (@IAFF2878) May 19, 2018
King County Sheriff's officials said two mountain bikers were attacked. One was killed. Another is unaccounted for.
#UPDATE @kingcosoPIO says that 2 people were attacked however 1 person is unaccounted for. Deputies and fire fighters are looking for the second victim. https://t.co/0eti2InEox โ€” KIRO 7 (@KIRO7Seattle) May 19, 2018
KIRO 7's Deborah Horne reports the injured mountain biker was taken to Harborview for treatment. Responders found the mountain biker who was killed with the big cat still standing over the body.
A mountain biker was found dead with a cougar standing over him on a trail #NorthBend. @kingcosoPIO says a second biker was also hurt. Now they are warning hikers to stay away from the Tolt Reservoir/Hancock road area. Working to get more precise location. @KIRO7Seattle โ€” DeborahHorne (@DeborahKIRO7) May 19, 2018
Wildlife officials will now work to find the cougar.

Cougars, also known as mountain lions, are the largest members of the cat family in Washington state, according to the Washington Department of Fish and Wildlife.

Mountain lions can be found throughout Washington state, Department of Fish and Wildlife officials say, where suitable cover and prey live.