A mountain lion killed one mountain biker and mauled another in Washington state on Saturday when they rode into its territory. State officials later tracked the animal and shot it dead, police said.

The mountain bikers were riding together down a remote, backwoods trail at 11am local time in an area near North Bend, Washington state, around 30 miles (48 km) east of Seattle, when the they encountered the animal.

In the ensuing attack, the first rider received deep scratches and the other was dragged away by the cougar to its den, King county sheriff spokesman Sergeant Ryan Abbot said.

The 31-year-old survivor rode two miles out of the area and called 911.

KIRO-TV reported that the injured man called 911 shortly before 11am and shouted: “Can you hear me? Help!” and then the call hung up.

Police drove up the trail, found the victim’s bike and went into the woods where they came across the cougar standing over the victim’s body, Abbott said.

“He or she, I don’t know if the cougar was a male or female, had the body of the victim down in his den,” said Ryan.

A deputy took a shot at the animal, sending it fleeing into the woods. Officers of the state fish and game department tracked the cat with dogs and killed it, Abbott said.
The surviving cyclist was taken to hospital in Seattle with serious but none-life-threatening injuries, he said.

Fatal cougar attacks are extremely rare in North America, with only about two dozen recorded in the last 100 years, most of them involving children.

It was only the second deadly attack by a mountain lion in Washington state in the last 100 years, Abbott said.

Cougars are the fourth largest cat species worldwide, with adult females weighing up to 141 pounds (64 kgs) and males weighing as much as 220 pounds (100 kgs).

They attack prey by ambush and usually attack humans only if cornered.

Reuters and Associated Press contributed to this report.