Explosions have been heard and black smoke filled the air as a fire continues to blaze at a business in William Street.
Firefighters and emergency services from across the region are battling the fire, which has led to traffic chaos in the area.
The fire is alleged to have been deliberately lit earlier on Saturday afternoon.
The site backs on to the the north-south railway line, which has temporarily been closed.
Animals from the nearby RSPCA shelter were being evacuated.
Due to the heat, measures were taken to ensure the firefighters at the scene remained hydrated.
More information to come.