Johannesburg -The Pretoria zoo's two-metre black mamba has escaped from its enclosure, and staff have been unable to find it, Beeld reported on Tuesday.

Craig Allenby, the zoo's marketing manager, said staff realised last week that the snake's terrarium was empty.

“The area was immediately cordoned off, and stayed cordoned off for two days while we hunted, but in vain. We suspect the snake could have slithered into the roof, but we can't get in there because of the angle and the narrow gap.”

There was no need for hysteria, he said, as the black mamba was in all likelihood preparing for hibernation, and was in a constricted area, with little chance of it reaching any member of the public.

“It would have to get through three doors before coming into contact with the public.”