Scotland Yard has said an incident involving an escaped gorilla at London Zoo has "concluded", amid reports it has been shot with a tranquilliser dart and recaptured.
ZSL London Zoo earlier said it was "managing an incident" following reports of an escaped gorilla.
The gorilla is thought to have escaped from its enclosure at the central London zoo, with reports that members of the public were then locked in to other parts of the zoo.
Footage posted on social media from the zoo shows armed police walking through the zoo's grounds.
Eyewitness Brad Evans, who has been allowed to leave the zoo, told BBC Radio London: "We were in the zoo for the day, having a cup of coffee in the main restaurant area when they locked us all in and said there was an incident.
"They gave us free teas and coffees and obviously we were asking what was going on and they told us that a gorilla had got out of its enclosure and that we weren't allowed out of the park at half-five so we had to wait.
"As we were waiting we saw the police turning up in numbers with loads of guns."
According to the zoo's website there are at least seven gorillas living in its Gorilla Kingdom.
Among them is Kumbuka, a western lowland silverback, who arrived at ZSL London Zoo in early 2013 from Paignton Zoo in Devon.
Others include Zaire, who came to London Zoo in 1984 after being born in Jersey Zoo, Mjukuu and her daughter Alika, "teenager" Effie, and Gernot, the latest addition who was born in November last year to Effie and Kumbuka.
