DALLAS (CBSDFW.COM) - Dallas Fire-Rescue crews responded to a three-alarm fire at a vacant commercial structure on Mar. 10.

Dallas Fire-Rescue responded to a 911 call about a fire at 11505 Anaheim Drive at around 10:19 a.m.

When crews arrived on scene, heavy smoke could be seen pouring from the two-story building, which formerly housed an adult-oriented business. Firefighters began attempting to contain the fire as Command called for a second- and then third-alarm response.

Investigators said that most of the roof collapsed into the structure, making it difficult to access the inside of the building.

About 50 to 60 firefighters responded to the scene, and multiple streams and hoses were used to drown the flames.

No injuries were reported, and the cause of the fire is undetermined.