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
Arsenal manager Arsene Wenger has urged supporters to back the team after claiming they lost the title due to a "very difficult climate".
Today marks the fifth anniversary of the royal wedding. Here we look at the highlights, in pictures.
A US citizen has been sentenced in North Korea to 10 years hard labour after being found guilty of spying.