Bengal tigers are at risk from poachers in the wild
Two Bengal tigers have been released into their new £200,000 purpose-built enclosure at a zoo near Bristol.
Six-year-old females Kushkja and Tira have been kept in isolation for six days while they acclimatised to the setting at Wraxall, North Somerset.
A spokeswoman for Noah's Ark Zoo said police had been involved in the preparations - should the tigers escape from their electrified enclosure.
Kushkja and Tira will soon be joined by four-year-old male Tanvir.
The Wildlife Institute of India calculate between 1,300 and 2,200 Bengal tigers exist in the wild, down from an estimated 40,000 a century ago.