A teenager has had a lucky escape from a bear attack after waking to find the animal biting his head.
The 19-year-old had been working at a camp in Colorado and had been sleeping outside Glacier View Ranch, about 48 miles northwest of Denver.
He woke up at 4am yesterday, Sunday, to a "crunching sound" and found the bear's jaws digging into his head as the animal trying to drag him out of his sleeping bag.
The boy fought back, punching and hitting the animal as his colleagues woke up, realised what was happening and also tried to deter the bear.
Eventually, the animal gave up and walked away.
The boy, identified only as Dylan, was treated in hospital.
Dylan teaches wilderness survival at the camp and, while his 12 and 13-year-old students had been asleep nearby, none of them were hurt.
He told KMGH-TV
that he thought the bear had dragged him between 10 and 12 feet before he was able to escape.
"The crunching noise, I guess, was the teeth scraping against the skull as it dug in."
He also told KCNC
: "I just started hitting the bear as hard as I could.
"And I found its eye, and I started poking its eye with my fingers.
"I feel really lucky - if I would have been turned any other direction, it could have gotten the side of my face or my neck."
Traps have been set for the bear and wildlife officers will also use dogs to search for it.
Any bear caught is likely to be euthanised before being tested to see if it is the culprit, according to Colorado Parks and Wildlife spokeswoman Jennifer Churchill.
Black bears are not usually aggressive but they will fight to defend their cubs and they are also attracted to tents with food inside.
Last month, a 16-year-old boy was killed after he got lost during a mountain race south of Anchorage and a woman was mauled to death about 275 miles northeast of the city.