Up to 40 firefighters are currently battling a significant blaze in the vicinity of Ashvale Farm Shop situated on the Old Ballynahinch Rd, Lisburn.
Emergency services responded to the incident shortly after 6am.
Group Commander Suzanne Fleming said: "NIFRS are attending a well-developed fire in a storeroom on Old Ballynahinch Road, Lisburn. Firefighting conditions were challenging on arrival, and firefighting operations include crews wearing Breathing Apparatus, and various water jets are in use to prevent fire spread.
"Approximately 41 firefighters attended the scene, 6 appliances – 2 x from Lisburn, 2 x from Belfast, 1 x Ballynahinch and 1 x Carryduff, an Aerial Ladder Appliance from Belfast , Water Tanker from Warrenpoint and a Command Unit from Kilrea were in attendance.
"Firefighting operations are ongoing. All persons accounted for, cause of the fire is undetermined at this time."
A notice on their Facebook page read "Due to a major fire at Ashvale this morning, we will be closed for the foreseeable.We will give further details in due course. The Herron Family"
No further information at this time.