The family of missing teenager Becky Watts have spoken of their devastation at hearing that body parts have been found in the search for her.
Her distraught father, mother, stepmother, brother and grandparents have all spoken of their pain following the grim discovery made by detectives hunting for the 16-year-old.
They all spoke out as Avon and Somerset Police were granted an extra 24 hours to question a 28-year-old man and a 21-year-old woman on suspicion of murdering Becky.
Four other people - three men and a woman - also remain in custody after being arrested on suspicion of assisting an offender.
Becky's father and stepmother Darren and Anjie Galsworthy said: "To receive such news as we did today about our dear daughter and stepdaughter Becky is too much to bear.
"We have the support of a good family network to help us in these challenging times.
"We would ask that you treat Becky with the due reverence and allow us to come to terms with our grief in private."
The teenager's mother Tania Watts, brother Daniel and grandmother Pat said: "We are devastated to be told of this latest development.
"We are at an utter loss to understand why anyone would want to hurt our beautiful Becky in such a brutal way.
"We are grateful to the police for all they have done and are continuing to do in this investigation.
"Whilst there are people in custody, none of whom are connected to the Watts family, we will not be making any further comment and we ask that our privacy is respected at this horrific time."
John Galsworthy, speaking on behalf of the Galsworthy family, paid tribute to Becky as a "wonderful" daughter, sister, granddaughter and niece.
"We are heartbroken at what has been discovered overnight," Mr Galsworthy said. "We cannot begin to understand what has happened and why.
"Becky was a wonderful daughter, sister, granddaughter and niece and we cannot put into words how devastated we are.
"We are pulling together as a family and ask to be left alone at this time."
Becky vanished from her home in Crown Hill, St George, Bristol at around 11.15am on February 19.
She left home with her iPhone, laptop and tablet computer but did not tell friends or family where she was going, or take extra clothing.
She was reported missing at 4pm on February 20 and a large search operation - involving six police teams each day - was launched.
Hundreds of leaflets were printed and pasted in windows, on cars and in shops, while a social media campaign, using the hashtag #FindBecky, gained thousands of hits.
The reach for the social media campaign to find her has been more than four million people worldwide.
Earlier today, Detective Superintendent Mike Courtiour said that information received by police late last night led them to a house at Barton Court in the Barton Hill area of Bristol where body parts were found.
"The information suggested that Becky's body had been cut up and a search at the new location resulted in the discovery of body parts," he said.
"Although formal identification procedures have not yet been completed, we have made Becky's family aware of this discovery."
As part of the investigation, four men, aged 29, 29, 23 and 23, have been arrested on suspicion of assisting an offender, along with a 23-year-old woman.
Police cordoned off Barton Court - a few yards from where forensic experts had been searching a property in Cotton Mill Lane - and erected a large white tent at the front of a modern mid-terrace house.
Forensic teams collected rubbish and food waste bins earlier from properties around the Barton Court area.
A private ambulance was also seen arriving and then leaving Barton Court a short time later.
Sixteen forensics officers wearing protective white suits and face masks then walked into the rear of the property.
A further property in Southmead and Becky's home have also been scoured by forensic teams.
Tearful residents have spoken of their horror at the discovery in the quiet cul-de-sac.
A 63-year-old grandmother, who would only give her name as Jen, said: "All the kids go out to play around here.
"I'm scared to imagine that I might have missed her. I am totally devastated and I can't stop shaking and I feel so, so sorry for the parents - my heart goes out to them.
"That poor baby."
A vehicle matching the description of the Vauxhall Zafira police have appealed for information about can be seen in the Google Street View of Barton Court.
Detectives seized the black car over the weekend but asked anyone with sightings of it, particularly between February 19 and 23, to come forward.
They also urged previous owners of the vehicle, registration plate HY06 HYA, to contact them on 101 immediately.
Floral tributes have begun to be left close to the house at Barton Court where police made the grim discovery.
One simply read: "RIP Becky Watts."
Another said: "Becky, you will be sadly missed but never forgotten. Our hearts go out to ur (sic) family and friends on this sad day. Goodnight sleeptight you r (sic) with the angels now xxx."
Flowers were also left at the gates of Becky's home in Crown Hill in St George, Bristol.
A small teddy was placed among the flowers, along with cards addressed to the Galsworthy family.
One tribute read: "Such a tragic loss. Thoughts are with the family. RIP Becky."