A major incident has been declared after a suspected ammonia leak at Kilkeel.
The Southern Health Trust has declared the emergency after an incident at a fish plant in the Co Down port.
A spokesperson said: “We have implemented our major incident plan following a suspected chemical incident in Kilkeel.
“We are expecting 14 patients to Daisy Hill Hospital for assessment.”
People are being asked to stay away unless absolutely necessary.
“The hospital is busy and we would ask the public to only come to ED if they have an urgent life threatening condition,” added the spokesperson.
The PSNI said a multi-agency response was put in place involving Northern Ireland Fire and Rescue Service, Northern Ireland Ambulance Service, including the Air Ambulance, PSNI and the Southern Health Trust.
Northern Ireland Fire & Rescue Service said it was called at 12.38pm to a report of an ammonia gas leak in the vicinity of the Harbour Road.
“The cause of the leak had been isolated prior to the arrival of fire crews,” a spokesperson said.
“Firefighters wearing breathing apparatus surveyed the site with gas monitors to check for the presence of ammonia gas – all readings were zero.
“Firefighters gave oxygen therapy to two casualties prior to the arrival of ambulance crews.
“Fire crews from Kilkeel, Newcastle and Warrenpoint Fire Stations remain at the scene.
“Ambulance personnel are transferring casualties to hospital.
“Daisy Hill Hospital requested NIFRS to standby to provide support in receiving casualties if required. At this stage no action has been required.
“There is no risk to the public from this gas leak.”
Police said none of those involved are believed to have sustained life-threatening injuries.
The Health and Safety Executive will be attending the factory where the leak was detected.