A self-inflicted hit of pepper spray drives off an attacking grizzly in Grand Teton National Park

A grizzly that accidentally inflicted itself with a burst of pepper spray while attacking a hiker in Wyoming's Grand Teton National Park won't be captured or killed because it may have been trying to protect a cub, park officials said in a statement.

While mauling a hiker on Signal Mountain, the grizzly bit into the man's can of bear repellent and was hit with a burst of it, causing the animal to flee. The 35-year-old Massachusetts man, who'd pretended to be dead while he was being bitten, made it to safety and spent Sunday night in the hospital.

There was no word when Signal Mountain or a road and trail to its 7,700-foot (2,300-meter) summit would reopen after being closed because of the attack. Such closures are typical after the handful of grizzly attacks on public land in the Yellowstone region every year.