Fire gutted a German zoo in the early hours of Wednesday, killing all monkeys kept in the building.
Krefeld Zoo stated that its “worst fears have become a reality” after its monkey house was razed in the inferno.
The 2000 square meter enclosure housed rare Bornean orangutans, chimpanzees and marmosets, among other animals.
Local media report the fire may have been caused by New Year fireworks.
This has not yet been confirmed.
The zoo said the Gorilla Garden nearby, which houses western lowland gorillas, was spared.
The monkey house was built in 1975 and recreated a tropical climate for rainforest inhabitants, which included fruit bats and free-flying birds, as well as primates.
The zoo thanked people for their “numerous offers” of help.
“We ask for your understanding that we cannot be there for you today,” it said regarding its decision to close on New Years Day.