An “extremely intoxicated” woman was taken to the hospital late Tuesday after entering the elephant pen at Denver Zoo and receiving a shock from an electric fence, police and officials said.

The incident happened at about 9 p.m. local time during the attraction’s annual Zoo Lights holiday event, the zoo said in a statement to NBC affiliate 9News.

“No animals were in the yard at the time,” said the statement, which described the woman as “disoriented.”

Denver police and Denver Zoo are talking to guests to determine what happened. — Denver Zoo (@DenverZoo) December 24, 2013

“The woman was transported for medical care. Denver police and Denver Zoo are talking to guests to determine what happened,” it said.

The Denver Fire Department told the Denver Post newspaper that woman received a shock from an electric fence, and 9News said she was treated for minor injuries at the scene.

ZOO UPDATE (1/2): No electrocution. Extremely intoxicated female entered elephant pen at zoo & sat down next to electrical wires. — Denver Police Dept (@DenverPolice) December 24, 2013

In a post on its Twitter feed, the Denver Police Department said: “No electrocution. Extremely intoxicated female entered elephant pen at zoo & sat down next to electrical wires.”