Detectives investigating the armed robbery of a hotel in Sydney’s south west last month have released an image of a man they believe can assist with inquiries.

Just after 1.30pm on Tuesday 22 July 2014, a man entered the hotel on the Hume Highway at Liverpool armed with a large knife.

The man, who had his face concealed, threatened a staff member with the knife while demanding money.

He fled with a large sum of cash and left the hotel in a grey Hyundai Excel.

Police were alerted and officers from Liverpool Local Area Command attended and commenced inquiries.

Checks later revealed the vehicle had been stolen from Warrawong earlier that day.

Detectives have released an image of a man they believe may be able to assist with their inquiries, as well as a photo of the stolen vehicle.

He is described as being of Aboriginal / Torres Strait Islander appearance, between 185cm and 190cm tall and with a heavy build.

Police are urging anyone with information about the incident to come forward.