Bird Creek, Alaska (CNN) - A brown bear sow and two cubs attacked a woman jogging near a popular Alaskan campground on Monday.
Susanne Knudsen was wearing headphones and did not have bear deterrent.
She told troopers she saw two brown bear cubs come out of the brush in front of her, and then she was hit from behind by the mother bear.
"Judging by the location she was probably within 10 yards of the bears when she noticed them,” said Jessy Coltrane, Alaska Department of Fish and Game. “The brush is really thick, the grass is tall parsnip and fireweed on other side of the trial in that location."
"Got her shoulder, her face, went back in the bush, and then came back at her again," said Jennifer Clark, tourist.
Knudsen was able to call 911 from her cell phone, but a group of tourists found her first, and helped.
Knudsen was airlifted to the hospital, with serious injuries to her head and neck.
Fish and game officials believe this to be a surprise attack, and they will not hunt these bears.
But officials do say the trail will be likely closed through the weekend.