The leopard that was captured last week after it entered a private school in Bengaluru and injured three forest department personnel has escaped from the enclosure in Bannerghatta Biological Park, where it was caged. A senior official said it could have escaped late on last Sunday night, though the incident came to light only on Monday morning. An operation is underway to track and recapture it. Officials said there were three layers of barriers and it was difficult (for the animal) to escape by itself.