S.F. Zoo Reopens

January 3, 2008 12:00:00 AM PST
The San Francisco Zoo reopened for the first time since a deadly tiger attack.On Christmas day, an escaped tiger killed a teenage visitor and injured two others.

Thursday morning visitors noticed more signs posted warning them not to pester the animals.

A new public alert system has also been installed.

Meanwhile, there are still questions remaining over the events that led to the tiger's escape at the zoo last week.