Fire investigators are still trying to determine the cause of an explosion that killed a family of four Monday night in Northfield.

The Summit County Sheriff's Office reports the bodies of two adults and two children were recovered by first responders when they arrived on scene to the home on Skyhaven Road around 9 p.m.

Fire Chief Frank Risko tells NewsChannel 5 that a mother, father and two girls, ages 8 and 12, died instantly inside the home. 

The cause of the fire is not known, but officials do not believe it was a gas explosion.

Additional counselors will be available today at the Nordonia School District.