Des Moines fire officials are investigating a possible case of arson at 1429 MLK Parkway in Des Moines. They were called to the blaze just after 4:40 am Wednesday. According to officials on scene, this was an intentional fire set on the first floor of the duplex. When crews arrived on scene, there was also a vehicle on fire. Officials say they have one person in custody who they believe started this fire. Des Moines Police say no charges have been filed yet.