A training exercise is causing thick black smoke to rise from west Tulsa that can be seen around the nearby area.
Area residents may have noticed the plumes of smoke Tuesday morning. It's caused by a training exercise that is being held by the Holly Frontier Refinery located on the west side of Tulsa.
Officials with the refinery company want to remind residents that there is no danger from this smoke. The exercise was previously planned.
Training will continue throughout the day, according to the statement from the company.