Dallas police said they believe someone cut an opening in an enclosure and took two emperor tamarin monkeys, small primates with long whiskers that look like a mustache.
“It was clear the habitat had been intentionally compromised,” the zoo said in a statement that offered few other details.
The zoo has said that it has added additional cameras and increased overnight security patrols.
Animals have escaped enclosures from the Dallas Zoo before. Most notably, a 340-pound (154-kilogram) gorilla named Jabari jumped over a wall in 2004 and went on a 40-minute rampage that injured three people before police shot and killed the animal.
DALLAS (AP) — Two monkeys were taken from the Dallas Zoo on Monday, police said, the latest in a string of odd incidents at the attraction being investigated —