Two people were able to get away after allegedly robbing a man inside an apartment building in Waterloo.

Waterloo Regional Police say a gun was used during the robbery, which occurred last week at a building on Columbia Street West.

A 22-year-old Kitchener man inside the building was treated for a minor injury.

Police say they believe everyone involved in the robbery knew each other, and want to hear from anyone with information that could help investigators.