A cow moose with two calves at Denali National Park and Preserve has injured at least two visitors in the past 10 days.

The Fairbanks Daily News-Miner reports (http://bit.ly/1AUKCKW ) that Denali park staff have been urging visitors to be especially careful around wildlife after the moose's defensive and erratic behavior near Riley Creek Campground over the last several weeks.

One woman was hurt badly enough to be sent to the hospital for treatment.

Spokeswoman Kathleen Kelly says the woman was taking pictures of the moose when the animal be aggressive and charged the crowd. The woman fell and the moose brought its hoof down on her shoulder.

Kelly says wildlife technicians tried to scare the moose away from the campground, at one point using paintballs, but it kept returning.

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Information from: Fairbanks (Alaska) Daily News-Miner, http://www.newsminer.com