A shop worker was hit on the knee by a man armed with a hammer during a robbery in Castlereagh on Friday night.
The robber demanded that money be placed in a bag during the incident at a business premises on the Gilnahirk Road shortly after 11pm, before making off with the cash.
It is understood the staff member was not seriously injured.
DUP East Belfast MLA Robin Newton said it must have been “a dreadful experience for vulnerable staff”.
“Once again thugs have carried out an armed robbery and have shown their willingness to use violent behaviour to achieve their deplorable ends,” said the Policing Board member.
“This incident could so easily have resulted in a very serious situation with awful consequences. Workers in local shops and filling stations are defenceless when the gangsters strike.
“Not only can they suffer physical violence but in the after effects of the incident mental health problems can result.
“The police need support from the public to put those who carry out such violent crimes behind bars.”