Knut, the polar bear who drew millions to Berlin Zoo, is dead, the DPA newswire reported.
The four-year-old polar bear collapsed and died this morning in his pen, the newswire reported zoo official Heiner Kloes as saying. Kloes said the zoo aims to carry out an autopsy on the bear to find out the cause of his death.
Knut was hand-reared, notably by keeper Thomas Doerflein, after being abandoned by his mother. He drew 3.2 million visitors to the zoo, an incorporated company, in 2007 and appeared on the cover of Vanity Fair magazine. Doerflein died in 2008 aged 44.