WILLIMANTIC, Conn. (WTNH) — A fire at an apartment building in Willimantic Tuesday afternoon left a firefighter injured and 18 people displaced.

Willimantic Fire Department Chief Marc Scrivener said the fire started shortly after 3 p.m. at Ivy Garden Apartments. Firefighters began arriving on the scene and there was fire coming out of the front and back of the building that they worked to get under control for a little over an hour and a half.

Scrivener said six units are destroyed.

Conditions were tight because the buildings are side by side.

“Well, it’s not only the buildings with the apartments,” Scrivener said. “We have 66 apartments in this building. We’ve got to get in there… It takes a lot of manpower.”

The chief said a firefighter sustained a minor injury.

The Red Cross is helping out those who have been displaced, which includes six children.

Scrivener said Wednesday Fire Marshal Michael Licata ruled cooking as the cause of the fire.

According to Scrivener, a building official visited the site again Wednesday and ordered the facility manager to keep contractors off the roof. The official also ordered a construction fence to be erected around the building.

This is a developing story. Stay with News 8 for updates.