Two tiger attacks at the San Francisco Zoo occurred on December 22, 2006 and December 25, 2007, both involving a 243-pound Siberian tiger named Tatiana (June 27, 2003 — December 25, 2007). In the first incident, a zookeeper was bitten in the arm during a public feeding. During the second incident, in which two people were injured and one killed, police officers fatally shot the tiger.
Tatiana was born in Denver on June 27, 2003. She was brought to the San Francisco Zoo on December 16, 2005 to provide a 14-year-old Siberian tiger, Tony, with a mate. Tony's prior companion, Emily, had died of cancer of the spleen in late 2005. Tatiana had no record of aggression towards humans.
During a public feeding on December 22, 2006, Tatiana clawed and bit veteran zookeeper Lori Komejan's arm which was pulled between the cage bars. Komejan's right arm was severely injured as a result. The California Occupational Safety and Health Administration later found the zoo at fault due to inadequate safety precautions and inadequate staff training. The San Francisco Zoo was fined US$18,000 for the incident. The Zoo decided not to euthanize Tatiana after the attack on Komejan because, in the words of the zoo's then-director Manuel Mollinedo, "the tiger was acting as a normal tiger does."