VIDEO: Cause of March Blaze at Ray's RV in Banning Ruled 'Undetermined'

The cause of a fire that destroyed several motor homes and caused an estimated $1 million in damage at Ray's RV in Banning in March was ruled "undetermined," a Cal Fire arson investigator said Tuesday.

The fire broke out the night of March 3 in a service area at , 4500 W. Ramsey St.

Cal Fire Southern Region Chief Dale Hutchinson spotted the fire from Interstate 10 and reported it at 8:13 p.m., Cal Fire officials said.

Six engine crews responded from Banning, Beaumont and Calimesa and declared the blaze contained at 8:50 p.m.

No injuries were reported but the blaze destroyed four RVs and caused an estimated total of $1 million damage, according to Cal Fire-Riverside County.