Four tigers escaped from their cage at the San Francisco Zoo on Tuesday, and one of them killed a visitor and injured two people, according to local news reports.

Police shot and killed the tiger, said ABC station KGO-TV. The other three were captured and returned to their cage.

The injured visitors were taken to a hospital and listed in serious but stable condition, the station said.

The attacks happened about 5 p.m. local time (8 p.m. EST Wednesday), and the zoo was evacuated.

The incident happened a year after a Siberian tiger ripped the flesh off a zookeeper’s arm as horrified visitors looked on. The public feeding house was closed following the December 22, 2006, attack, and reopened in September after $250,000 was spent on safety upgrades.

Before Tuesday’s incident, the zoo had two Siberian tigers, including the one that mauled the employee, and three Sumatran tigers.

Soure : http://www.reuters.com/article/topNews/idUSN2533572920071226

            : http://edition.cnn.com/2007/US/12/25/tiger.attack/