About 40 D.C. firefighters responded to a dumpster fire outside Varsity on K Sunday, where residents evacuated the building and filed along 24th Street, watching smoke fill a nearby alleyway.

The D.C. Fire and Emergency Medical Services dispatched an engine company with 12 vehicles to the fire burning in a large dumpster adjacent to a building at about 5:20 p.m., D.C. FEMS spokesperson Vito Maggiolo said. He said responders were concerned the fire could enter the building through a window but they extinguished the blaze before it could spread any further.

“They had a large dumpster that was adjacent to a building, and there was potential that it might be spreading through a window into the building,” Maggiolo said. “So they called for additional resources.”

Maggiolo said the fire triggered a box alarm that required a larger response from D.C. FEMS, with about 12 vehicles and 40 firefighters. No one was injured at the scene, Maggiolo said.

D.C. FEMS first reported the fire with a tweet at 5:29 p.m.

Residents and onlookers outside the building said about 20 to 30 people were evacuated during the incident.