Emergency services remain at the scene of a fire at a premises on Severn Road, Treforest Industrial Estate, Rhondda Cynon Taff.
This follows reports of an explosion at a property shortly after 7.00pm last night.
There are no reports of any serious injuries. However, one person remains unaccounted for.
The fire is now largely extinguished, with small pockets of fire remaining. Some roads and businesses in the area will still be affected.
Six pumping appliances, several other appliances and crews remain in attendance. A High Volume Pump had been drawing water from the River Taff, although this has been scaled back and is planned to be withdrawn by around midday, to enable the opening of more roads, which will further alleviate traffic in the area.
A joint investigation team from South Wales Fire and Rescue Service and South Wales Police, in conjunction with the Health and Safety Executive are now on site to determine the cause of the fire.
