Avon and Somerset Police searching for missing teenager Becky Watts have found body parts at a home in Barton Court, in Bristol.
Detectives attended the home last night and arrested five people - four men and one woman - on suspicion of assisting an offender.
Detective Superintendent Mike Courtiour said her body had been "cut up".
Two people - a 28-year-old man and a 21-year-old woman - were arrested on Saturday on suspicion of kidnapping the teenager. They are now suspected of having murdered her.
Courtiour said: "As a result of new information received late last night (2 February), we attended a house at Barton Court in the Barton Hill area of Bristol.
"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.
"Although formal identification procedures have not yet been completed, we have made Becky's family aware of this discovery.
"As a result of this latest development, a further three men and two women have been arrested on suspicion of assisting an offender.
"They remain in police custody at this time as do the man and the woman arrested on suspicion of Becky's murder.
"This is devastating news for Becky's family and friends and our thoughts are with them. We will continue to offer every support we can to them during this terrible ordeal."
The schoolgirl was last seen on 19 February by her step-mother Angie-Mae Galsworthy when she left her Crown Hill home with her phone, laptop and tablet device.
A laptop that was later found in woodland near her home was later ruled out as belonging to Watts.
Police called for anyone who had seen a black Vauxhall Zafira - registration HY06 HYA - between 19 and 23 February to come forward.
The car had been seized but public was asked to help trace its whereabouts during those days.