Kannapolis police and fire department have determined that a recent fire on Rosemont Avenue was intentionally set. Marvin Johnson, 55, of Kannapolis has been charged with first-degree arson and is in the Rowan County Detention Center under a $100,000 bond. Police confirmed that two people were inside the structure at the time of the fire and both sustained injuries. One person was treated and released at a local medical facility. The second person was transported to Wake Forest University Baptist Medical Center for evaluation and treatment. This investigation remains on-going.