BERLIN • A fire raced through a zoo in western Germany in the first few minutes of the new year, killing more than 30 animals, including apes, monkeys, bats and birds, authorities said. Police said paper sky lanterns launched nearby to celebrate the arrival of 2020 were probably to blame.

Several witnesses saw cylindrical paper lanterns with little fires inside flying in the night sky shortly after midnight Wednesday near the Krefeld Zoo, Gerd Hoppmann, the city’s head of criminal police, told reporters.

“People reported seeing those sky lanterns flying at low altitude near the zoo and then it started burning,” Hoppmann said.

He said investigators also found used lanterns on the ground that hadn’t burned entirely. They were over 13 inches long, made out of white paper with an opening at the bottom where a small fire would be suspended. The fire heats the air inside, making them fly and shine at night.

Police and firefighters received the first emergency calls at 12:38 a.m.

The zoo near the Dutch border said its entire ape house burned down and more than 30 animals — including five orangutans, two gorillas, a chimpanzee and several monkeys — were killed, as well as fruit bats and birds.

Only two chimpanzees were able to be rescued from the flames by firefighters. They suffered burns but are in stable condition, zoo director Wolfgang Dressen said.

“It’s close to a miracle that Bally, a 40-year-old female chimpanzee, and Limbo, a younger male, survived this inferno,” Dressen said, adding that many of the zoo’s animal handlers were in shock at the devastation.

“We have to seriously work through the mourning process,” Dressen said. “This is an unfathomable tragedy.”

He said many of the dead animals were close to extinction in the wild.

The zoo said the Gorilla Garden, which is near its devastated Ape House, didn’t go up in flames and that gorilla Kidogo and six other members of his family are alive.

Germans usually welcome in the new year with fireworks at midnight and people are allowed to buy and launch fireworks.

Sky lanterns, however, are both illegal and uncommon in Krefeld and most of Germany.

Firefighters stand in front of the burning monkey house Wednesday at Krefeld Zoo in Germany. A fire at the zoo killed a large number of animals in the early hours of the new year, authorities said.

the associated press