DALLAS (CBSDFW.COM) – Dallas Fire Rescue officials are looking into the possibility a molotov cocktail was used to start a fire at an apartment complex in the southwest part of the city.

Crews arrived at the complex on Westmoreland Road, south of Interstate-20, just before 3:00 a.m. and found heavy smoke and flames shooting from the roof of one of the units.

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(credit: CBSDFW.COM)

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As firefighters worked to get the 1-alarm blaze under control, witnesses told investigators they had seen someone through a bottle filled with gasoline up against the window of the apartment that was burning.

It took crews about an hour to get the fire under control. No one was injured.

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The investigation as to the cause of the fire continues.