North Wales Police has said a cordon around missing vet Catherine Gowing's car will remain in place for some time as a "dynamic" search takes place.
Miss Gowing's Renault Clio was found burned-out in an isolated area of Pinfold Lane, near Mold, close to a disused quarry surrounded by woodland and near to the quarry pool.
Det Supt John Hanson said the area would continue to be cordoned off while a "comprehensive search and extensive examination" takes place.
He also said specialist search teams were examining two other locations in North Wales which have not been identified.
More top news
“We can use peace”, the US President told the pontiff in their first face-to-face meeting on Wednesday.
A man with a knife has been arrested near Buckingham Palace in an incident Scotland Yard said was not believed to be terror related.
Kim Dick spoke about her fears as she comforted a young Manchester Arena victim as she waited anxiously for news of her own family.