A grizzly bear attack in Grand Teton National Park in Wyoming left a 35-year-old Massachusetts man with serious injuries over the weekend, the National Park Service announced.

Park officials believe that the bear was naturally trying to protect its cub when it attacked the 35-year-old Massachusetts hiker.

Shayne Patrick suffered serious injuries when he was attacked by a grizzly bear while hiking up Signal Mountain in Wyoming’s Grand Teton National Park.

A tourist in Grand Teton National Park found himself outside his car and just feet from a large male grizzly bear recently as guides and other tourists implored him to get back into his vehicle.

Rangers in Wyoming's Grand Teton National Park were unable to determine if speed was a factor in the recent vehicle strike that killed a sub-adult grizzly bear on a park highway. The 5-year-old ...

Grand Teton National Park's most famous, and possibly prolific, female grizzly bear was struck and killed by a vehicle the evening of Tuesday, Oct. 22, according to a park news release.