NATIONAL PARKS -- Olympic National Park rangers killed an elk Friday after it had charged three vehicles and damaged a tent at the Hoh Rain Forest campground.

This event comes a year after a mountain goat was killed after it gored and killed a backpacker, and two weeks after another mountain goat menaced a hiker for more than a mile on a backcountry trail.

The Peninsula Daily News reports rangers started monitoring the female Roosevelt elk on Friday after it damaged a tent and charged a park vehicle. They used loud noises to scare off the elk over the weekend when it approached campers or hikers.

After it charged two more vehicles on Monday, rangers decided to kill it. A section of its brain was taken for lab tests for a possible explanation of its behavior.