SACRAMENTO (CBS13) — A storage unit facility fire that sent black smoke into the sky and across Interstate 80 early Saturday morning has been extinguished.

Firefighters from the Sacramento Metro Fire Department were called to the 4200 block of Industry Drive just before 6 a.m. A total of 10 units were damaged.

They remain on scene cleaning up.

The cause is under investigation, but is believed to be arson, according to the fire department.