A man brandishing a knife stole money from commercial premises in Portadown on Sunday.
The incident happened at premises in the West Street/Atkinson Avenue area.
At approximately 5.30pm a male with a foreign accent entered the premises brandishing a knife. He demanded money and put his hand in the till and stole a sum of money. He then made off on foot.
The male is described as being tall, slim build and wearing a light grey hoodie and faded black scarf.
No one was injured.
Detectives would ask anyone who noticed any suspicious activity or who has any information to contact them at Lurgan on 0845 600 8000. Or, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.