gorilla has been recaptured after escaping from its enclosure at London Zoo.
The zoo earlier told the BBC it was “managing an incident” after reports an animal had escaped.
Visitor Brad Evans said customers had been locked inside the cafe at about 17:10 BST and told by staff a gorilla had escaped from its enclosure.
Police said the incident had now “concluded” amid reports the gorilla was shot with a tranquilliser dart.
Met Police officers arrived at the zoo at 17:20 and said the was animal recaptured shortly before 19:00.
‘Like Jurassic Park’
Mr Evans said he had been visiting the zoo with his daughter and son-in-law and they did not want the gorilla to be shot.
He added that visitors had since been allowed to leave the zoo.
Eyewitnesses Hannah O’Donoghue-Hobbs and Charlotte Neild likened the gorilla’s escape to “like being in Jurassic Park “.
They told BBC London they had been escorted away from windows near the enclosure by the police.
They added the gorilla had been seen by other visitors and that it had appeared to be “really angry” and was “banging on the cage”.
Ms O’Donoghue-Hobbs and Ms Neild said they overheard that the gorilla had been tranquilised.
The escape comes after Harambe, another gorilla, was shot and killed at Cincinnati Zoo in the US after a young boy fell into its enclosure.
The boy was not seriously hurt and Harambe’s death sparked anger on social media.