TULSA, Okla. (AP) -- Fire crews have been battling a large fire at an oil refinery in Tulsa.
Neighbors told local news outlets they heard an explosion at the refinery in west Tulsa early Thursday.
No other details were immediately available.
The refinery is owned by Dallas-based HollyFrontier Corp. According to the company's website, the Tulsa refinery has a crude oil capacity of 125,000 barrels a day.