TULSA, Oklahoma - HollyFrontier tells News On 6 a fire broke out at its Tulsa West Refinery Sunday morning.

A viewer was driving by and sent in video. HollyFrontier says the fire started around 8:15 a.m.

We are told the emergency response team at the refinery was able to quickly get the fire out, and no one was injured. The cause of the fire is under investigation, according to HollyFrontier.