Police did not say why the woman jumped into the enclosure. She had to climb over a fence, a line of prickly hedges and a wall to get in.
She suffered serious injuries after being bitten on her arms and legs.
http://www.telegraph.co.uk/news/worldnews/europe/germany/5142098/Woman-survives-polar-bear-mauling-at-Berlin-Zoo.html?tsp=1