HAVRE DE GRACE, Md. (WJZ) —  Deputy state fire marshals and ATF agents are still working to determine what caused a Harford County home to go up in flames.

It happened Monday night on Chapel Road in Havre de Grace near the Mount Felix Vineyard & Winery.

Investigators say the flames started in the living room and quickly spread throughout the two-story vacant home.

One firefighter was hurt but is expected to be okay.

The home has been vacant for over a year.

Investigators are asking anyone with information about the home, or who saw anything suspicious on the property, to call their tip line.

CBS Baltimore Staff