At approximately 18:00 hours crews responded to assist Ellis FD on a possible structure fire. Spencer Chief 7500 arrived on the scene with a single story structure with smoke showing. Engine 751 (Spencer) arrived on the scene and stretched 2 lines. Ellis Engine 481 arrived on the scene and laid a water supply. Engine 643 (MFFD) arrived on the scene and assisted interior with fire attack. Additional alarms were requested for additional personnel and water. Crews were able to achieve a knock down and go under control in 45 minutes. Crews remained on the scene for several hours for overhaul.