CHEYENNE, Wyo. — For the second time in three days, an elk has attacked someone in Yellowstone National Park.

The National Park Service said a female elk with a calf on Tuesday attacked 53-year-old park visitor Penny Allyson Behr of Cypress, Texas, behind the Mammoth Hot Springs Hotel.

Yellowstone officials say the elk surprised Behr as she walked between cabins. Behr backed away but the elk kicked her in the head and body.

Behr was taken to a hospital. Her condition wasn't immediately released.

On Sunday, a female elk with a calf kicked 51-year-old Charlene Triplett of Las Vegas in the head and body behind the same hotel. Triplett was in fair condition Tuesday.

Park officials are unsure if it was the same elk. They say the animals aggressively defend their young.