A man in his 60s is recovering in hospital after an explosion at a storage facility.
It is understood a gas cylinder exploded at an IDA Industrial Estate on Cork Road, Waterford, at about 10am on Thursday.
A Garda spokesman said the man was rushed to Waterford Regional Hospital with non-life-threatening injuries. A 650ft cordon has been put in place around the building and a number of factories have been evacuated as a precautionary measure.
The Health and Safety Authority is investigating. The worker is said to have suffered minor burns to his arms and face.
Firefighters have brought the fire under control but remained at the scene of the explosion.
The IDA said the building is leased to Waterford Institute of Technology. An IDA spokeswoman said: "We wish the injured man well."
Waterford City Fire Service confirmed there were two gas explosions involving oxygen and acetylene at WIT's Applied Technology Campus.Gardai, ESB, Bord Gais and BOC, which supply industrial, medical and special gases, are also on-site.
WIT said one staff member was injured and taken to hospital where his condition is described as comfortable. His family have been informed.
Elaine Greenan, estates manager for WIT, said: "Our priority at the moment is to ensure that the area is made safe as soon as possible and we've been working closely with the authorities to that end.
"The Health and Safety Authority will carry out an investigation into the incident and we will assist them in any way we can. We will also carry out our own internal investigation."