COFFEYVILLE, Kan. - A fire broke out at a refinery in the Coffeyville area early Tuesday, sending four people to the hospital with burns. The fire department tells KAKE News the fire broke out at the CVR refinery around 12:20 a.m. Crews needed about an hour to put the fire out. The cause of the fire is under investigation. A message left with CVR Refining's headquarters in suburban Houston was not returned as of Tuesday morning. The refinery's website indicates it can produce 115,000 barrels of oil per day.