WATCH: Fire Damages Popular Houston Gay Bar

No one was hurt but a popular gay bar in Houston went up in flames over the weekend in a fire that's now under investigation.

The fire inside The Eagle in the Montrose neighborhood on Saturday afternoon kept dozens of firefighters busy for hours. Video from the scene showed flames shooting from the the roof and smoke rising into the sky could be seen for miles, Houston TV station KHOU reported.

Customers and employees scrambled when the lights flickered and the smell of smoke permeated the air.

Arson investigators have not yet announced the cause, as they search for any signs of foul play, reported KHOU.

The building's sprinkler system was installed but not yet activated, according to the report.

Fire officials tell KHOU there is serious smoke and flame damage to the second and third floors, but the main business on the first floor suffered only water damage.

Owner Jay Allen vowed to rebuild. "We will be back, yes we will be back," Allen told the station.

Watch the report from KHOU below.