DALLAS —

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 — including fences being cut and the suspicious death of an endangered vulture in the past few weeks.

Related video above: Dallas Zoo closes to search for clouded leopard that was later found

No arrests have been made in any of the investigations, and police have not said whether the incidents are linked.

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 incident follows the Jan. 13 closure of the zoo and a daylong search when a clouded leopard named Nova went missing.

She was eventually found near her habitat, but police said a tool had been used to cut an opening in its fencing. A similar gash also was found in an enclosure of langur monkeys, though none got out.

On Jan. 21, an endangered vulture named Pin was found dead, and the zoo said the death did not appear to be natural. Zoo President and CEO Gregg Hudson said the vulture had "a wound."

Ed Hansen, chief executive of the American Association of Zoo Keepers, said he could not recall a zoo facing similar incidents with such frequency.

"It appears that somebody really has an issue with the Dallas Zoo," Hansen said.

Hansen, who described the Dallas Zoo's reputation as "excellent" within the industry, said accredited zoos have double-perimeter fencing and that a zoo as large as Dallas' would have a security patrol.

The zoo has said that it has added additional cameras and increased overnight security patrols.

The zoo said Monday that the two emperor tamarin monkeys that have gone missing would most likely stay near their habitat — but that a search of the zoo grounds failed to find them.

Animals have escaped enclosures from the Dallas Zoo before. Most notably, a 340-pound 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 —

The two small monkeys who were found in a vacant house a day after being taken from the Dallas Zoo lost a bit of weight during their ordeal but show no signs of injury, the zoo said Wednesday.

The disappearance Monday of the two emperor tamarin monkeys — named Bella and Finn — and the discovery that their enclosure had been cut was the latest in a string of unusual events at the zoo over the last few weeks, which has included other cut fences, the escape of a small leopard and the suspicious death of an endangered vulture.

Dallas police said they found the monkeys — who have long whiskers that look like a mustache — late Tuesday afternoon in the closet of a home south of the zoo after getting a tip from the public. No arrests have been made.

The zoo said Wednesday on Twitter that both Bella and Finn "started eating and drinking almost immediately" after they were examined, and the two were "so happy to snuggle in their nest sack" on Tuesday night.

"We will continue to monitor them closely, but for now, we're so glad they are safe and back with us," the zoo said in a Wednesday statement.

Police had released a photo and video of a man they said they wanted to talk to about the monkeys and were still seeking him Wednesday.

They are also trying to determine if the string of incidents over the last few weeks at the zoo are related or not.

On Jan. 13, arriving workers found that a clouded leopard named Nova was missing from her cage, and police said that a cutting tool had been intentionally used to make an opening in her enclosure. The zoo closed as a search for her got underway, and she was found later that day near her habitat.

Zoo workers had also found a similar gash in an enclosure for langur monkeys, though none got out or appeared harmed, police said.

On Jan. 21, workers arriving at the zoo found an endangered lappet-faced vulture named Pin dead. Gregg Hudson, the zoo's president and CEO, called the death "very suspicious" and said the vulture had "a wound," but declined to give further details.

The zoo said in its Wednesday statement that the incidents over the last few weeks have led officials there to "take a hard look" at security measures, saying that while what they've had in place has worked in the past "it has become obvious that we need to make significant changes."

The zoo said it has already implemented additional security measures that have included adding more cameras, additional fencing and more patrols, and will make other changes as well.

The zoo said that since Bella and Finn were taken away from the zoo, they'll need to undergo a quarantine period before they can return to their habitat there.

Meanwhile, in Louisiana, officials said they have launched an investigation after 12 squirrel monkeys were discovered missing Sunday from a zoo in the state's southwest. Their habitat at Zoosiana in Broussard, about 60 miles west of Baton Rouge, had been "compromised" and some damage was done to get in, city Police Chief Vance Olivier said Tuesday.

A 24-year-old man was arrested in connection to the thefts of two emperor tamarin monkeys from the Dallas Zoo, authorities said Friday.

According to the Dallas Police Department, Davion Irvin was arrested on Thursday after being spotted near the animal exhibits at The Dallas World Aquarium.

Earlier this week, police released a picture of a man they were seeking to speak with regarding the monkey thefts. The man was seen in a blue hoodie, eating Doritos. Police confirmed the man in the picture is Irvin.

He was booked into the Dallas County jail and has been charged with six counts of animal cruelty.

The monkeys were reported missing on Monday morning. Authorities said their enclosure was cut, allowing someone to gain access to the animals. They were found a day later at an abandoned home near the zoo, police said.

The missing monkeys were the latest in a string of odd events at the zoo. The zoo reports that other enclosures have been cut recently.

A leopard escaped from its cage in January. It was found hours later on zoo grounds.

The zoo is also investigating the death of an endangered vulture. Officials called the death suspicious.

Irvin has only been charged in connection to the case of the missing monkeys. However, the Dallas Police Department said he could face more charges in the future if investigations determine he had a role in the other incidents.