Three men robbed Santana's Mexican Food in Lemon Grove around 2:30 a.m. Monday.
The men were armed with a shotgun, hammer and baseball bat, according to the San Diego County Sheriff's Department.
The robbery was recorded on a surveillance camera. The video shows three masked men taking money out of the cash register. The robbers were in the restaurant for about two minutes.
NBC7 spoke to one employee, who said he was okay, but pretty shaken up.
The restaurant, located on Palm Street, is open 24-hours.
No other information was available.