The dissident republican group Oglaigh na h-Eireann staged a show of strength in County Londonderry.
On Friday night three uniformed and masked men appeared on the edge of the village of Park, to the south-east of Claudy.
At least one of them was carrying a firearm.
They posed for photographs before firing three shots into the air.
The dissident group then made a short statement in which they warned people they described as “drug dealers” to come forward to the group in the next two weeks.
They stated that “after that kneecappings are not an option, it is death”.
The three men then disappeared back into nearby trees.
Oglaigh na h-Eireann has claimed responsibility for a series of attacks in recent years in the north-west of the Province.