<p>SAN FRANCISCO - MAY 18: A grizzly bear, an endangered animal species, sits in an exhibit at the San Francisco Zoo May 18, 2007 in San Francisco, California. The U.S. celebrates the second annual Endangered Species Day with zoos, aquariums, parks and a host of educational institutions educating the public on how important it is to protect wildlife and the growing number of endangered species, both animals and plant life. (Photo by Justin Sullivan/Getty Images)</p>
Two grizzly bears escaped their primary containment and were in the secondary containment area after a door was left unsecured at the Milwaukee County Zoo Thursday.
It happened at 5 p.m. when the zoo was closing. The few remaining visitors were escorted to other zoo buildings as a precaution.
The bears never entered public space.
The zoo was able to lure the bears back into the secured area with food and the all clear was given at about 5:30 p.m.
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