RAWLINS, Wyo. (AP) — Another fire at the Sinclair Refinery in south-central Wyoming forced the evacuation of the plant but caused no injuries.

The fire broke out inside the refinery late Friday afternoon. The fire was reported about 4:25 p.m. and flames and smoke were visible from the Sinclair Town Hall until about 6:20 p.m.

It was the fourth fire at the facility since May.

Four workers were injured on May 8 in a flash fire in a gas recovery unit at the east end of the refinery. Shortly after, another fire injured two more employees. Another fire on Aug. 5 injured one person.

Sinclair Oil Corp. spokesman Clint Ensign tells the Associated Press  that the company is working to make the facility safer.