The suspect is described as white or Middle Eastern, between 5 feet 4 inches to 5 feet 8 inches tall, weighing between 140 to 160 pounds, estimated to be between 22 and 28 years old.
In all cases, he passes a note demanding cash and leaves after receiving the money.
Authorities believe he is working alone. No weapon has been seen during the robberies.
Anyone with information about the suspect is asked to contact Detective Mike Medici (951) 353-7104 or Detective Jim Brandt (951) 353-7137.