Chester zoo staff were trying to locate some of their animals on Saturday night after a fire destroyed much of the roof of the largest enclosure.

All the mammals had been located but keepers were said to be "working hard" to track down the rest of the animals, according to a statement released.

Orang-utans, gibbons, crocodiles, turtles and exotic birds are among the species housed in the Monsoon Forest, which recreates a tropical south east Asian environment and is billed as the largest indoor zoo exhibit in the UK.

The zoo said in a statement: "Critically endangered Sumatran orangutans and other mammals are all accounted for.

"We are working hard to account for all other species."