Investigators trying to determine how a tiger escaped its zoo enclosure on Christmas Day — killing one man and mauling two others — plan a thorough sweep of the zoo grounds Wednesday to look for clues.
Authorities do not believe more people were attacked, but they want to inspect the area in the daylight. Zoo officials are still uncertain how long the tiger, which last year badly mauled a zookeeper, was loose before being shot dead.
The three men who were attacked Tuesday while visiting the zoo were in their 20s, police spokesman Steve Mannina said. The attack occurred just after the 5 p.m. closing time, on the east end of the 125-acre grounds.
http://www.npr.org/templates/story/story.php?storyId=17606872
Growing up in San Francisco, we often went to the zoo on Christmas. The thought of any of the animals getting loose never crossed our minds.

This undated file photo provided by the San Francisco Zoo shows Tatiana, a female Siberian tiger. Tatiana, the tiger that mauled a zookeeper last year escaped from its pen at the San Francisco Zoo on Tuesday Dec. 25, 2007, killing one man and injuring two others before police shot it dead, authorities said. Associated Press © 2007
I find this story tragic both for the people and for the tiger. Even as a child, I was troubled about the very concept of "zoos." It upset me to see such noble animals in cages. Now, the big question is how did this Tiger get loose?
The approximately 300-pound female did not leave through an open door, Jenkins said. But he could not explain how it escaped — the tiger's enclosure is surrounded by a 15-foot-wide moat and 20-foot-high walls.
"There was no way out through the door," Jenkins said. "The animal appears to have climbed or otherwise leapt out of the enclosure."
Something smells fishy. I find it unlikely that the Tiger was able to climb out of the enclosure, or she would have done it before now. But somehow she got loose, leading to a tragic end for both man and beast.























