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Zoo officials have shot dead a gorilla after a four-year-old boy fell into its enclosure in the US city of Cincinnati.
The boy climbed though a barrier and fell into a moat, where he was grabbed and dragged by the gorilla.
The zoo said it took action to shoot the 400lb (180kg) gorilla as the situation was "life-threatening". The boy is expected to recover.
Last week two lions were shot dead in a zoo in Chile after a man entered their pen in an apparent suicide attempt.