SAN FRANCISCO — A baby gorilla may not have been crushed to death under an electric door if zoo leaders had responded to zookeepers’ concerns about the enclosure’s safety, five zookeepers told a newspaper.

The 30-year-old gorilla enclosure had a flawed layout, problems with the doors and was understaffed, the zookeepers told the San Francisco Chronicle in a story published Thursday.

The 16-month-old gorilla died Nov. 7 when she unexpectedly darted under the door as it closed.

Zoo Executive Director Tanya Peterson has said the worker operating the hydraulic door failed to keep her hand on an emergency stop button as required.

Zoo officials declined to comment. They are investigating the gorilla’s death.