One man has died and another is in critical condition following an incident at an industrial site in Portmarnock this afternoon.
The men were taken to Beaumont Hospital following the incident which occurred at approximately 230pm this afternoon.
One was later pronounced dead while the other man is still in critical condition.
A spokesperson for the Health and Safety Authority earlier confirmed the fatalities of two employees at drain-clearing firm Draintech.
However, a later report revealed that one of the men is still fighting for his life.
It is believed that those involved in the incident could have been overcome by fumes while working on a sewer.
Dublin Fire Brigade have said that they attended a "serious industrial accident" in the area.
Three units responded to the call out to the north Dublin scene.
Three firefighters were injured on site but their injuries are not believed to be serious.
A DFB spokesperson has said that the firefighters have been removed to hospital "as a precaution" but are "expected to make a full recovery".
Fine Gael TD Alan Farrell has tweeted his condolences after the incident.
We are currently attending a serious industrial incident in Portmarnock. 3 Appliances, 3 DFB ambulance and our APs pic.twitter.com/O0FwNLcSSE— Dublin Fire Brigade (@DubFireBrigade) June 10, 2015
"My thoughts with those involved in an industrial accident in #Portmarnock this afternoon," he said.
Gerry Stanley of the Dublin Fire Brigade said:
“Regular maintenance work was being carried out on the sewer system. One of these people got into difficulty and collapsed in to the pit, his colleague attempted to assist him and also collapsed into the pit."