At about 8.45pm on Monday 20 June 2011, a group of nine people were seen loitering at the entrance to a bottle shop in Centre Road, Clayton.
The group ran into the shop. One of the group brandished a knife and demanded the attendant hand over office keys, whilst the others grabbed various bottles of alcohol before they all fled the store.
A similar incident occurred at the same store three days later.
They are all described as young adults; one man was wearing a blue hoodie and dark pants.