A detective constable died in a house fire along with her two young sons, her force said today.
The bodies of Heather Bickley, 46, and the boys aged six and 10 were recovered from their home in Anglesey following the blaze early this morning.
North Wales Police, for which Mrs Bickley worked, was investigating the cause with the fire service.
A force spokeswoman said: "The joint investigation between police officers and fire service personnel, supported by the forensic science service at the scene in Tyn-y-Gongl, Anglesey, is ongoing.
"We can confirm that the investigating team have located two further bodies within the severely fire-damaged house.
"Those bodies appear to be of an adult and a child.
"North Wales Police can confirm that the house belongs to a serving North Wales Police officer and the 46-year-old woman who was one of two people unaccounted for is believed to be Detective Constable Heather Bickley.
"It is feared that the two children who died with her are her two sons aged 10 and six.
"The investigation into the cause of the fire continues.
"Heather's husband John is being supported by friends and family and a police specialist family liaison officer."