LOS ANGELES (CBSLA.com) — Crews were battling a fire at the Torrance Refinery Co. facility on Tuesday afternoon.

The refinery’s on-site fire crew began dousing the flames shortly after 4 p.m.

Crews from the Torrance Fire Department arrived later to assist in the firefight.

The flames began to subside at around 4:45 p.m. The fire appeared to be out shortly after 5 p.m.

Last year, an explosion at the facility forced its closure. The facility reopened in May.

The cause of Tuesday’s fire was not immediately known.

The city of Torrance said in a statement that some employees were injured and evaluated at the scene, but were not transported to the hospital.

The 750-acre refinery was previously owned by ExxonMobil but was sold to New Jersey oil refining concern PBF Energy last year for $527.5 million.