Up to 75 firefighters were needed to battle a raging blaze at a recycling plant which sparked a toxic fume scare across several neighbourhoods in south Dublin.
Investigators believe they won't be able to start forensic examinations at the Oxigen plant in Ballymount Industrial Estate until tomorrow morning as crews are still trying to extinguish the outbreak.
Gardai sealed off several roads around the site and warned residents in a number of areas - including Crumlin, Drimnagh and Kilmainham - to shut windows and doors and remain inside.
It was feared hazardous materials at the plant and toxic fumes from the fire could pose a health risk.
The blaze was first reported at 3.15am this morning.
As many as 75 firefighters from the Dublin Fire Brigade were needed to bring it under control at one stage, but by the afternoon the number had reduced to around 45.
There were no reported injuries but extensive damage was caused to a warehouse.
A Garda spokesman said: "We won't be getting in there for a while yet, it may be at least this evening before the fire is extinguished and we could have to wait until the morning for a forensic examination."
There are no early indications of the likely cause of the blaze.
The scene will be preserved for a full technical examination.