A Texarkana house fire is now being investigated as arson. It happened in the 4800 block of Jefferson Avenue Tuesday night . Texarkana, Arkansas Fire Marshall Stephen Johnson says an eyewitness saw someone come from the back of the home with what looked like a bottle of lighter fluid. No one was home at the time. Authorities say the person in question is described as a black male in his 30`s, about 6 foot tall, weighing around 200 pounds, wearing blue jeans, a green pullover shirt and a beanie type hat. If you have any information, call Crimestoppers.