(Garland County, AR) -- A fire that killed five people in Garland County, Arkansas Thursday is now being treated as a homicide investigation.

The bodies were discovered in and around a burned mobile home west of Little Rock.

Sheriff's investigators say one home caught fire in the early morning hours. 
Four bodies were found in the house.

The fifth body was discovered hours later in a second house -- on the same property. 

A car registered to the owner of the burned house also caught fire- in another part of town. 

That's one of the reasons authorities say the situation is suspicious.