In connection with the robbery attempt, one of the four perpetrators is said to have aimed a gun at the man.
When the man tried to strike the weapon, a shot was fired that hit him in the hand.
The man took himself to hospital to seek care.
No one is currently arrested in the case, which is classified as attempted aggravated robbery and aggravated weapon crime.
The police have carried out a door knock during the night and carried out a technical investigation.