Police are investigating an armed robbery which occurred in Sydney’s west today.

About 12.25pm today (Sunday 19 June 2016), a 49-year-old man was working at a tobacconist on Pendle Way, Pendle Hill, when two men entered the store.

One of the men threatened the attendant with a pump action shotgun, demanding cash.

An altercation took place, and the men were able to remove an amount of cash from the cash register before fleeing the scene in a vehicle described as a black Audi.

The vehicle was last seen travelling south on Pendle Way.

The attendant was uninjured.

The man with the gun has been described as about 180cm tall, wearing a red hooded jumper with white motifs, blue track suit pants, white sneakers and he was wearing gloves.

The other man is described as wearing a black balaclava, 180cm tall, sold build, wearing a black hooded jumper with an Adidas emblem on it, black track suit pants, black and white sneakers, and he was also wearing gloves.