Two men held up the Barcam Esso on Shamrock Road in George Town in an armed robbery early Sunday morning.
Police said the robbery occurred around 5:30 a.m.
The robbers took an undisclosed quantity of cash and made their getaway in a dark-colored compact vehicle, heading in the direction of central George Town.
The men are described as both being about 6 feet tall, one being of proportionate build wearing blue jeans and a plain, white T-shirt, while the other was of stocky build, wearing all black.
No shots were fired in the robbery and no one was injured, police said.