There's been an aggravated robbery in Wellington this evening.

Just after 7.30 tonight a man entered the Corinna Street dairy in Porirua and pointed a firearm at the lone male shop attendant.

The offender demanded money then left with a small sum.

He was wearing black clothing with his head covered and was carrying a long barrelled firearm.

Police are keen to hear from anyone who saw what happened or the offender getting away.