Published: Sep 16, 2010 7:53 PM EDT
Updated: Sep 16, 2010 4:53 PM EDT

QUINCY, Fla. (AP) - Fire officials say the cause of a house fire in rural north Florida that killed four adults was electrical.

Maj. Joseph Steadman with the State Fire Marshal's Office says the fire started in an air conditioning unit in a living room window, powered by an extension cord.

The medical examiner had not positively identified the victims Thursday. Steadman says early reports show the cause of death was smoke inhalation.

The four adult bodies were removed Wednesday from the burned out wood-frame home just north of Quincy near the Georgia border, about 25 miles northwest of Tallahassee. The blaze was reported shortly after 3 a.m.