More incidents at San Francisco Zoo

SAN FRANCISCO, Jan. 12 (UPI) -- San Francisco Zoo keepers say a bear and a leopard nearly escaped from their enclosures less than three weeks after an escaped tiger killed a man.

The two incidents last week renewed safety concerns about the popular zoo, The San Francisco Chronicle reported Saturday.

The height of the wall in the polar bear exhibit was raised Jan. 4 after a female bear nearly scaled the wall the day before, and a snow leopard chewed through a temporary enclosure Thursday, several zookeepers told the Chronicle.

The zookeepers said they feared for their safety and questioned whether visitors are safe, the Chronicle reported. Other zoo officials, however, said there was never any threat from the bear or leopard.

A Siberian tiger was killed by police at the zoo Dec. 25 after it escaped and killed 17-year-old Carlos Sousa Jr. of San Jose and mauled two of his friends.