1 person killed, 1 injured in mountain lion attack in Washington state

Experts say it's extremely rare for cougars to attack humans.
2:10 | 05/20/18

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Transcript for 1 person killed, 1 injured in mountain lion attack in Washington state
We start this half hour with a really scary story about a cougar attack. One man was killed by the animal. Another barely escaped with his life. Will Carr joins us with more. Reporter: Goomorning. One minute, the two men were biking. The next, attacked by a cougar. A terrifying encounter. One victim air-lifted to the hospital. The other killed. The first call came in. He's yelling for help. Reporter: This morning, wildlife officials in Washington state searching for answers after this cougar violently attacked a pair of mountain bikers. Sounds like the gentleman was attacked by the mountain lion. Reporter: It happened around 11:00 A.M. Saturday afternoon. From the rocky outskirts of tle. Two men biking down a remote trail when a large 100-pound cougar began to chase them. The pair managed to escape. When they started to yell, scaring the mountain lion away. The cougar circled back for another attack. It launched on to him. Latched on to his head. He said he had his whole entire head in the jaws of this animal and was being shaken around. Reporter: Miraculously, the cougar lets the man go. Allowing him to flee on his bike and then call 911. We have a second patient. Probably another five miles up north fork road. Was being attacked at the time our patient got away. Reporter: The other rider, unable to get away. Authorities finding the cougar standing over his body. Overnight, the manhunt for the dangerous cat coming to an end. The cougar tracked. Now being examined. Kind of scary. Reporter: Weeks before the attack, Steve captured footage of a mountain lion on the same road. He doesn't know if it was the same animal. Realize that, wow, there are things out here very powerful. This is their space. We have to respect that. Reporter: Experts say it's extremely rare for cougars to attack humans. Fish and wildlife saying only one other fatal attack in the last 100 years in Washington. They say there's no indication that the victims taunted the animal or did anything else to attract the attack, other than being in the wrong place at the wrong time. Dan and Diane? That's why there are questions to be asked here. Time to check the weather. Back to rob. Nice to have you sitting with us

This transcript has been automatically generated and may not be 100% accurate.

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