Rare Amur leopards born at zoo

Two Amur leopards - believed to be the world's rarest big cat - have been born at Twycross Zoo in Leicestershire, England.

It's believe there are only about 70 of the endangered species left in the wild.

The cubs don't have names yet. They are just a few days old and have not yet come out of their den.

Their parents, Kristen and Davidoff, also produced two cubs in 2014.