Temperature-sensitive animals in the Day Exhibit, which houses about 200 reptiles and amphibians, were moved after the building lost heat.

A fire at Woodland Park Zoo injured two firefighters Thursday afternoon and prompted a massive evacuation of tortoises, lizards, amphibians and snakes.

The fire was reported around 3:15 p.m., zoo staff said, and plumes of smoke were seen coming from the roof shortly after, in a building that formerly housed nocturnal animals.

The Night Exhibit closed in 2010 and is being renovated.

Fire crews had the blaze contained by around 5 p.m. Its cause remains under investigation.

Two firefighters were taken to Harborview Medical Center for minor injuries, said Seattle Fire Department spokeswoman Alice Kim. One suffered minor burns and a second suffered an injury possibly from an electrical shock during the fire.

No animals were known to be hurt, but the conditions of six turtles that had been in a hibernation chamber in the Night Exhibit building remained unknown Thursday evening, according to the zoo.

Firefighters stayed on the scene into the evening, planning to monitor the area overnight.

After the fire was reported, zoo staff quickly evacuated guests and made a plan to evacuate animals from the nearby Day Exhibit, which houses about 200 reptiles and amphibians, according to zoo spokeswoman Lauri Hennessey.

Firefighters removed tortoises, lizards, amphibians and nonvenomous snakes, then zoo staff helped evacuate venomous snakes — cold-sensitive animals that had to be moved because the building lost heat, she said.

Robert Trevino, a cook at the zoo, said he was doing daily duties when the fire broke out. He was instructed to prepare his work area and quickly evacuate, he said, while others took care of removing the animals.

The Night Exhibit of nocturnal animals closed due to financial problems.

Zoo staff relocated some of the exhibit’s animals to other facilities and placed others elsewhere at the zoo.

The zoo has since found funding to reopen the exhibit in 2018.