Changes in Brain May Have Led to Polar Bear Knut's Death

Anita Bugge/WireImage(BERLIN) -- Preliminary necropsy results on what caused the death of Germany's polar bear Knut came back Tuesday, revealing that "significant changes" in the bear's brain led to his sudden death.

Berlin Zoo officials said the results showed "no changes" in any other organs, and that further tests were being lined up, including bacteriological examinations.  The results from these extra tests won't be known for several days.

The four-year-old polar bear was found dead in his pen Saturday.

Copyright 2011 ABC News Radio

World Famous 'Knut' the Polar Bear Dies In Berlin

Anita Bugge/WireImage(BERLIN) -- The world famous polar bear Knut died Saturday, the Berlin Zoo announced.

The four-year-old polar bear was found dead in his pen. The cause of his death is unknown, and the zoo intends to administer a necropsy.

Knut was a major tourist draw for the zoo, garnering some three million visitors in 2007.

Copyright 2011 ABC News Radio