Boy in gorilla enclosure with animal
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Gorilla drags boy through moat in Cincinnati zoo

Zoo officials have shot dead a gorilla after a four-year-old boy fell into its enclosure in the US city of Cincinnati.

Amateur video footage shows the gorilla dragging the boy through the water in the moat.

The zoo said it took action to shoot the 400lb (180kg) gorilla because the situation was "life-threatening". The boy is expected to recover.

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