In what one German newspaper referred to as a tragedy, Knut the polar bear who captured the hearts of the world as a cub, has died. 

The four year old bear was alone in his enclosure when he suddenly collapsed and died.

Hundereds of visitors were watching the terrible sight as Knut lay motionless in the water, and people throughout germany were devastated.

Hundreds of flowers are being left at the Berlin zoo in tribute to this beloved bear.