Shoalhaven police are investigating a second armed hold-up in the Nowra area in 24 hours.
Police were called to the IGA supermarket in Lyndhurst Drive, Bomaderry on Monday night after an armed hold-up in which the store manager was struck on the back of the head with a firearm.
Two men, one armed with a bolt-action rifle, entered the supermarket about 7pm.
Five staff members and one customer were inside when the robbers demanded money.
The store manager was hit on the back of the neck with the rifle butt as he opened the till.
All three cash drawers were taken along with the contents of the safe and two handbags belonging to a staff member and the customer.
The store manager did not require treatment and there were no serious injuries.
The two men were seen getting into a dark coloured station wagon after they left the store.
The man with the rifle was wearing a red hoody and white gloves, while the description given for the second man was only that he was wearing a hooded top. Both men were wearing balaclavas.
Police were back in the area early yesterday morning canvassing local residents who may have seen or heard something.
The robbery followed an attempted armed hold-up at the Nowra Mall Subway on Sunday night.
Last month the IGA supermarket in Bomaderry Plaza, the IGA in Gerringong and the IGA at Barrack Heights were all targeted by armed robbers. These three incidents involved the use of a hammer as a weapon.
Anyone who can help should ring Nowra police on 4421 9699 or Crime Stoppers on 1800 333 000.