Fire broke out today at a saltwater disposal well site in McKenzie County.
The county emergency manager reports the fire at the Mesa Oil Corporation site began when a tanker was unloading its salt water and oil mixture.
He says a worker inside the facility and the truck driver were able to escape without injuries after an explosion started the fire.
The Alexander Fire Department responded to the site - about eight miles southwest of Alexander - and began spraying fire retardant foam on the blaze.
Emergency Manager Gary Samuelson says the cause of the explosion is so-far unknown.