"The animal should not be approached as it could become dangerous if alarmed or cornered."
A police helicopter joined the search for the missing carnivore, which is around the same size as a labrador, yesterday.
Officers are still in the area conducting door-to-door enquiries.
A Dartmoor Zoo spokesman added: "He is extremely timid and his instinct will be to stay away from people, so we are asking the public to be vigilant and inform the police on 999 if they see him."
