NEW YORK (CBSNewYork) — The Reptile House at the Bronx Zoo was closed Saturday after an adolescent Egyptian cobra went missing from an off-exhibit enclosure.

Zoo staff said they immediately closed and secured the building after learning the snake was missing. Egyptian cobras are poisonous.

READ MORE: Stimulus Check Latest: Will There Be A Fourth Relief Payment?

Officials at the zoo said they were confident that the snake, about 20-inches long, was confined to an isolated, non-public area of the building. Snakes typically seek closed-in spaces, and are uncomfortable in open areas.

READ MORE: New Jersey Ranked 48th In List Of Best States; Residents Say 'That's Ridiculous'

“We are informing the public out of an abundance of caution, and will continue to take whatever steps necessary to ensure public safety,” the zoo said in a statement.

MORE NEWS: Watch The Derek Chauvin Trial Live

The Reptile House will be closed indefinitely, zoo staff said.