Officers responded to the gas station on the 3600 block of Saviers Road around 4 p.m. following reports of a robbery Sunday.
The suspect allegedly entered the business with a handgun and demanded money. The suspect then fled the area on a bicycle with an undisclosed amount of cash.
He was described as a Hispanic man in his 30s, standing around 5 feet 9 inches. He was last seen wearing a black sweatshirt, blue jeans and a surgical mask.
The same business was robbed on Oct. 6 by a suspect of a similiar description. In both incidents, the suspect fled on a bicycle.
Anyone with information regarding the robberies was urged to contact Oxnard police at (805) 385-7740.