Chester Zoo: CCTV records rare tiger birth
8 June 2013 Last updated at 06:14 BST
The birth of a Sumatran tiger cub has been recorded by CCTV at Chester Zoo.
After a pregnancy lasting 150 days, Kirana, a seven-year-old tiger at the zoo, gave birth to two cubs at about midnight on Sunday.
The zoo described it as "incredibly special" as the species is classed as critically endangered, with only 300 to 400 left in the wild.