ASHLAND, Ky. — Two adults died Sunday morning in a house fire on Ashland's Garfield Avenue, the Ashland Fire Department reported.

Firefighters arrived at the single-story residence in the 2400 block of Garfield Avenue around 7 a.m. to find smoke pouring from the structure. Neighbors told crews that occupants were possibly trapped inside, according to a press release from the Ashland Fire Department.

Crews located two adult victims in the structure and transported them to an Ashland hospital via Boyd County EMS. Both victims succumbed to their injuries at the hospital.

Firefighters brought the flames under control by 7:22 a.m., though not before the fire caused heavy damage to the home's foundation, resulting in the collapse of the first floor.

The Ashland Fire Department said the investigation into the cause remains ongoing. Officials noted the home had no operating smoke detectors at the time of the fire, though the initial investigation revealed no signs of suspicious activity.

The Ashland Police Department, Boyd County EMS, Westwood Fire Department, and Catlettsburg Fire Department assisted in the response.

"The Ashland Fire Department extends our deepest condolences to the family and friends of the two victims during this tragic time," the department said in a statement.