Police have arrested a man in relation to a robbery in Wellington. (File photo)

A man has robbed a Wellington dairy while brandishing a needle at the shop attendant.

The man entered the Choc Fizz store in Riddiford St, in the suburb of Newtown, about 7pm on Thursday.

He demanded money while threatening staff with a needle, eventually leaving the shop with cash and cigarettes.

Police arrested a 32-year-old man a short time later on a nearby street.

A police spokeswoman said no-one was injured, and the arrested man would be charged in relation to the incident.