Emergency crews are continuing to search for signs of life in the debris of a building that collapsed at a power station, leaving one person dead and three others missing.
Five people are also in hospital after a concrete and steel structure at the derelict Didcot A site came down as contractors prepared it for demolition.
Three people are still missing.
Speaking at the scene, Oxfordshire Assistant Chief Fire Officer Simon Furlong emphasised the mission was still “very much” a rescue operation.
When asked if crews had heard any signs of life, he said: “We”ve had some signs from the search dogs, but this is a very difficult situation with the debris field, so they are working with those crews.
“But we”ve had no significant signs, but that doesn”t mean to say there isn”t saveable lives still within the building.”
Specialist search and rescue teams, including sniffer dogs, have been involved in the search operation at the site in Oxfordshire, which Mr Furlong said could continue for “several days”.
A 100m cordon has been put in place around the scene as the rescue operation continues.
Some 50 people were treated for dust inhalation after the collapse, and a major incident was declared soon after emergency services were called at 4pm on Tuesday.
Didcot A opened in 1970 as a coal-fired power station and was later converted so it could also generate power from natural gas.
It ceased generation in March 2013 and hundreds gathered to watch when three of its enormous cooling towers were blown up in July 2014 after dominating the town”s skyline for more than four decades.
According to the RWE npower website, the total demolition of the site is expected to be complete by the end of this year.