A 19-year-old man has been arrested on suspicion of two armed robberies.
The man was quizzed over knifepoint robberies at One Stop on Copnor Road, Copnor, on December 22, and at One Stop in Chichester Road, North End on January 31 in which cash was stolen.
In both cases the robber demanded staff hand over cash. It is not known how much money was taken. The suspect has been bailed pending further inquiries.