The 13-year-old male tiger was tranquilized and remains at the zoo.
She "entered that same portion of the night house after it was clearly designated as accessible by a tiger," said Andrew Aiken, president of Palm Beach Zoo.
"Under Palm Beach Zoo policy, zoo employees are never allowed to enter a tiger enclosure to which the animal has access."
Threats against tiger
The rare tiger, one of four at the facility, is held in a contained area where the animals are fed and sleep.
Zoo officials have declined to provide information on the tiger, including its name.
"Identifying the animal only serves to stigmatize and potentially places the tiger in harm's way," the zoo said. It said it has received threats against the animal.
Zoo officials have said the tiger was off-exhibit at the time and no guests saw what happened.
Konwiser worked at the zoo for three years, and had a lot of experience with tigers, according to zoo officials.
"This was her specialty," zoo spokeswoman Naki Carter said.
"You don't get into this business without the love for the animals and understanding the danger that's involved even more."
Endangered subspecies
The Occupational Safety and Health Administration is investigating.
"Why or how this could possibly occur is the subject of five ongoing investigations, including our own," Aiken said.
Recent attacks by big cats
Source → Florida keeper broke rules before tiger killed her, zoo says