Employees at a northeast Calgary liquor store were the victims of a violent robbery Wednesday night, the second time in just over four months.

Police surrounded Deep's Liquor store located at 3250 60th Street northeast just after 11:30 p.m.

They received reports that two men entered the business with their faces concealed and that one of the men was brandishing a handgun.

Calgary Police on scene told CTV News the suspects demanded cash from the employees. One of the suspects then pointed the gun into the air and fired one round into the ceiling.

The employees ran to the back of the store, and according to police, that's when the thieves helped themselves to the cash in the till.

The two suspects got away.

It appears no one in the store was seriously hurt during the robbery, but employees and customers were left in shock.

Coincidentally, a male customer who was in the store in this latest armed robbery was also present when the liquor store was held up back in February.

In that incident, a robber walked into the store, pulled out a knife and demanded money.

The store's owner and a male customer wrestled the robber to the ground. The suspect started fighting back and stabbed the employee repeatedly.

The suspect was then hit over the head with a liquor bottle, that's when he fled. The owner was taken to hospital in non-life threatening condition.

The entire incident was captured on the store's surveillance video camera. 

A 29-year-old man was eventually arrested and charged in the February 10th incident.

Meanwhile, police are hoping by looking at surveillance video in this latest robbery will help them track down the two male suspects. Police believe they were wearing either balaclavas or toques.

Investigators are also looking into whether these two suspects are responsible for an incident at a liquor store in the area of Canyon Meadows Drive and Elbow Drive southwest earlier Wednesday night.