Transcript for Baby Gorilla Crushed to Death at San Francisco Zoo
For some families the guerrillas were the first animals they wanted to see at the zoo but didn't get to we came in this morning about 1030. End in about my daughter was all excited about going to be the gorilla thing. Didn't see any. Last night of the day was being put into her sleeping area that's when according to the zoo the young guerrillas darted out was crushed by closing hydraulic door and was killed. Could be they had been one of the zoo's stars she was a rare example of a berth in captivity. This summer the zoo even celebrated her first birthday treating the whole gorilla preserve two fruits and other goodies. This is the latest a string of incidents involving San Francisco Zoo animals in December of 2011. A squirrel monkey named banana Sam went missing. I think spokesman says someone broke into his enclosure and took him he was returned a couple days later but had a son died last year from heart disease complications. And in 2007 a Siberian tiger named Tatiana. Escaped her enclosure at the cat killed one spectator and injured two others zoo officials would not speak publicly about this weekend's incident but in a statement said. This type of accident is extremely rare in the zoo wishes to assure the public that all animal care protocol at the facility. Is specifically designed with animal safety as the top priority. Just before closing time zoo visitors said they were able to see the guerrillas the guerrilla have that was open. And there Amir and mayor and they're doing their thing in the gorilla stuff but they said no signs throughout mentioning what happened. Two administrators say they're still investigating. In San Francisco sent him he'd done at ABC 7 NEWS.
This transcript has been automatically generated and may not be 100% accurate.