At least four businesses have suffered damage following a fire early Saturday morning, Dallas Fire-Rescue said.

DFR told CBS News Texas that at about 5:55 a.m., a passerby reported seeing a fire at the retail shopping center at 5405 W. Lovers Lane. When firefighters arrived, they saw smoke coming from the roof of the two-story building.

DFR said crews deployed handlines and moved in for an offensive attack, but the fire, which was in the attic, spread quickly. A second alarm was called, bringing in about 45 to 50 firefighters to the scene.

In an afternoon update, DFR said it took firefighters over four hours to extinguish hot spots before declaring the fire extinguished at 10:07 a.m.

At least four businesses were damaged from the fire, with most of the damage located in the attic space.

No injuries have been reported.

The cause of the fire remains undetermined and is under investigation.