A zookeeper was among several people arrested Wednesday night at a wildland zoo in northwestern New Jersey after he tried to prevent koalans from leaving a nearby home.
The zoo was closed for the night while officials worked to clear up the mess, said Andrew Stoner, a spokesman for the Garden State Conservation District.
He said officers were working with zoo staff to find a way to get the animals back home safely.
Koalas are known for being aggressive and noisy and have been reported biting people and other animals, and even making their way into buildings.
They have also been known to bite people and their pets.
They can be dangerous because they can leap over fences and are known to jump from trees, and the animals have been known by people to be territorial and to try to avoid people.