Officials in the Arizona Game and Fish Department in Tucson say they released a video Wednesday as a warning to wildlife watchers.
The video, released on the AZGFD Facebook page , shows a bear chasing a cub up a tree and killing it.
The incident took place in June on Mt. Graham, about 100 miles northeast of Tucson. The AZGFD says the bear likely saw the cub as a threat to its success in mating.
Officials say they released the video to show why bears are so dangerous.