Officials say a Boy Scout leader was injured during an encounter with a bear in northern New Jersey, but three Scouts with him were unharmed.

Rockaway Township Mayor Michael Dachisen says the attack occurred around noon Sunday at Split Rock Reservoir in the Morris County community.

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The Scout leader was flown to a hospital for treatment of injuries that are not considered life-threatening. Further information on his condition was not immediately available.

The three Scouts were rescued by searchers.

It's not clear what prompted the attack, which is under investigation by the state's Environmental Protection Department.

This is a developing story. We will have additional updates as they become available. 

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