Detectives investigating the deaths of three children and their father at a Shropshire beauty spot have recovered a knife.
The bodies of Sam Fuller, 12, and his sisters Becka, aged eight, and seven-year-old Charlotte, who was known as Charlie, were found in isolated woodland on Monday. It is believed they died from knife wounds.
The body of their father Ceri Fuller, 35, was found nearby at the Poles Coppice, on Pontesbury Hill, near Shrewsbury. He is thought to have fallen from a cliff.
Mrs Ruth Fuller, the wife of Ceri Fuller and mother to the children, issued a brief statement on Tuesday.
She said: "l don't have the words to describe how l feel at the moment. All l would ask is that l be left alone to grieve for my family".
West Mercia detectives have launched a murder investigation but described the deaths as a "tragic family situation" and are not looking for anyone else.
Detective Chief Inspector Neil Jamieson, who is leading the investigation, said: "I can disclose that a weapon has been recovered from the scene.
"Officers involved in the search found a knife in the vicinity of where the bodies were found. It will now be forensically examined."
Mr Jamieson said the old quarry and surrounding woodland would remain cordoned off as officers continue a detailed search of the area.
Post-mortem examinations will be conducted on Tuesday afternoon by a Home Office pathologist and may not be concluded until Wednesday, the detective confirmed.
Police are appealing for information about possible sightings of a red Land Rover Freelander and its four occupants on Thursday.
Mr Jamieson said: "We believe this vehicle left Gloucestershire at some point last Wednesday evening or early Thursday morning and we are anxious to establish its movements since then, especially in the Pontesbury area.
"We believe it was in the Leominster area at around midday on Thursday before making its way up towards Welshpool later that day."