It is "highly unlikely" three people missing after part of a power station collapsed are alive, emergency crews have said.
One person died and five are in hospital after a concrete and steel building at the derelict Didcot A site in south Oxfordshire came down at around 4pm on Tuesday while it was being prepared for demolition.
Dave Etheridge, Oxfordshire Fire and Rescue Service Chief Fire Officer, said: "We have just spoken to the families who are obviously distraught.
"We have explained to them we have not picked up any signs of life but we are doing everything we can to locate their loved ones.
"It is highly unlikely they are alive."