Becky's step-brother, Nathan Matthews, and his girlfriend, Shauna Phillips, are reportedly being held by police on suspicion of murdering the teenager. Officers must either charge or release them by this afternoon.
The family of a 16-year-old girl who has been missing since Thursday have made an emotional appeal for her to come home.
Rebecca Watts was last seen at home in the Crown Hill area of Bristol.
Today her father Darren Goldsworthy struggled to make it through a written statement, but told his daughter how much she was loved.
Her grandmother Pat Watts finished the family statement, adding that if anyone knows where Rebecca is they should "do the right thing" and get in touch.
Detective Inspector Richard Ocone of the Bristol CID added that Rebecca's disappearance is out of character and that she's not in any trouble.
Anyone with any information is asked to get in touch with the police.
Becky Watts' uncle speaks exclusively to ITV News following the arrest of two people on suspicion of her alleged kidnap and murder.
Sam Galsworthy, uncle of missing Becky Watts, has spoken about the family's anguish as the search for her continues and they wait for news.