PORTLAND, Ore. -

Documents newly released by the regional government that oversees the Oregon Zoo in Portland show multiple "sloppy" mistakes preceded the January death of a 20-year-old orangutan.

Metro leaders have said the firings of the zoo's director and top veterinarian are related to the death of Kutai. The documents show that no zoo employees were disciplined for the mistakes, which included a vet tech's failure to promptly notice that an anesthesia bag was overinflated during an operation on the ape.

The Oregonian reports that Metro summarized a labor law firm's investigation following a public records request by the newspaper. Metro has declined to release the full investigative report.

Zoo director Kim Smith and senior veterinarian Mitch Finnegan were dismissed in early May.