(WBIR) Investigators said they're trying to determine what sparked a fire overnight Wednesday, which severely damaged a north Knox County home.

Rural/Metro firefighters responded to the house fire near Andersonville Pike at about 1 a.m.

Crews on the scene said it didn't appear anyone was inside the home when the fire began.

Read or Share this story: http://on.wbir.com/1fqJp10