Transcript for Urgent search for a lion in Southern California
growing concern after a series of mountain lion attacks in California. Tonight, another mountain lion putting a community on alert, after attacking several pets. Here's Matt Gutman. Reporter: Tonight, the urgent search for this mountain lion prowling the streets of southern California, possibly preying on pets. It's definitely nerve-racking for the homeowners that have dogs or cats. Reporter: One family says their teenage daughter was home alone in Simi Valley when the lion pushed up against a glass door and stared inside. It was purring and hissing at my dogs. Reporter: That big cat casually walking the streets, emaciated, with a tracker around its neck. Police received the first call late Wednesday night. The same lion suspected of attacking and wounding a family's dog. He's looking for food, he's eating our pets, and will hurt our kids, too. Reporter: The second attack, killing a mini-schnauzer. The owner fighting to save her dog. She jumped on top of the mountain lion and was trying to pry its jaws open to save the dog. Reporter: David, authorities believe that the tracker for this animal stopped working years ago. They have a permit to go back and recapture it. But they tell us this is a wild nocturnal animal and finding it is not going to be easy. David? Matt, thank you. When we come back tonight,
This transcript has been automatically generated and may not be 100% accurate.