A man is due in court charged with a number of offences after a firework was thrown at an ambulance crew as they treated an injured man.
The attack happened in the early hours of Sunday morning after the crew were called to a bar in the Trevor Hill area of Newry.
As the ambulance staff were treating a patient who had suffered an injury to his leg, a firework exploded at their feet.
The blast caused burn damage to their uniforms.
Despite the distraction, crews continued to treat the patient before taking him to the nearby Daisy Hill Hospital.
A spokesman for the Northern Ireland Ambulance Service said it was "particularly concerned at this incident given that it occurred in such a confined space" thereby "increasing the potential for more serious injury to the crew and others present".
"The person who threw this firework, obviously, thought it was great fun when, in actual fact, the opposite is true", he said.
"That no-one was seriously injured is a result of nothing more than good fortune.
"This incident also had a knock on impact on the provision of our service in the Newry area as the crew, who to their credit, and in stark contrast to the actions of the individual responsible, continued to provide care to their patient but were unavailable to respond to further calls immediately after the incident as they were required to make statements to the police."
A 20-year-old man is now due to appear in court on Monday charged with two counts of common assault, two counts of criminal damage, possession of an offensive weapon and disorderly behaviour.