A two-alarm fire engulfed apartment building 3 at Huntington Circle Apartments Monday evening, displacing residents of eight units.

Firefighters were dispatched at 10:25 p.m. Two engines, two medics and a fire truck responded. A second alarm was sounded at 10:33 p.m. and another engine and medic joined the first group.

One person was medically treated and one cat was given oxygen on the scene, according to recordings of the fire department radio traffic.

Investigators determined the fire started outside the building’s first floor. Dennis Weddle, capital expenditure vice president and ownership representative, said the present companies did a good job salvaging more of the building than they originally anticipated due to the severity of the fire.

A two-alarm apartment fire melts surrounding cars. (Photo by Steve Southwell)

“[The fire] actually got down through floor joists and ran through the center of the building,” Weddle said. “It was a hard one to try to put out, but they did a great job.”

The cause of the fire has yet to be determined, and investigators are in the process of eliminating potential causes. Division Chief Mark Richards was investigating the scene Tuesday with a K-9 and an investigator from Denton Fire Rescue.

Weddle said two main units were damaged by the flame and remaining units had mostly smoke or water damage.

Residents from five of the eight affected units will be relocated within the apartment complex while the remaining residents intend to find housing elsewhere. Huntington Circle put affected residents in a hotel for two days, Weddle said.

Huntington Circle Apartments at 409 W. Round Grove Road previously had a two-alarm fire in February 2015 that displaced nine residents and injured one firefighter.