Becky's Uncle, Joe Galsworthy, has released an emotional letter:
Becky Watts' family have laid flowers at her St George Home surrounded by a media scrum:
The reported arrest of Becky Watts' stepbrother and his girlfriend in connection with her suspected murder "continues to haunt" her family, her brother said.
Dan Galsworthy posted an emotional message on Facebook revealing his turmoil.
He said: "This has left a deep hole in my heart and will continue to haunt me.
"To everyone messaging and supporting me I haven't replied to any messages because I simply have no words, I thank you all and deeply appreciate everyone's support. Love to you all."
Matthews is understood to be the son of Anjie Galsworthy, 49, who is married to Becky's dad, Darren, 51, who fathered her and Dan with their mum Tanya Watts, 46.
Detectives are also questioning four men, two aged 29 and two aged 23, and a 23-year-old woman, who have been arrested on suspicion of helping an offender.
The first picture has emerged of the couple suspected of killing Becky Watts.
Seen here in fancy dress, Shauna Phillips and Nathan Matthews, are being held in police custody.
Officers have until this afternoon to either charge or release them.
Police confirm the female suspect, who is reported as being Shauna Phillips, was taken to hospital last night after feeling unwell.
She has since returned to custody.
Hundreds of flowers have been placed outside Becky's St George home.
This follows the tragic news that body parts were discovered in the search for the missing 16-year-old.
Bristol City beat Leyton Orient last night to go ten points clear at the top of League 1.
City recovered from conceding an early goal to beat struggling Leyton Orient 3-1.
Despite Orient scoring within 5 minutes, City quickly equalised with a Luke Freeman close range finish.
Anden Flint scored a powerful header to put Bristol City firmly in control and in the second half Aaron Wilbraham scored his 16th goal of the season to put the game our of sight.
Close rivals MK Dons were beaten at home by Chesterfield which means City now have a 10 point lead at the top of the table.
A couple from Weston-super-Mare have won over a million pounds in the Lotto Jackpot.
Paul and Tania Newton say they're planing to spend their lucky fortune on paying off their mortgage and helping their grown-up children do the same.
Guitar salesman Paul, spent hours driving around to find his wife so he could tell her the good news in person.
They both plan to carry on working and keep buying their weekly lottery ticket.
It's been reported that the two people under arrest are Becky's step-brother, Nathan Matthews, and his girlfriend, Shauna Phillips.
Other media outlets have begun naming the pair over the last 24 hours and it indicates that Becky may have known her killer.
Police in Bristol have until this afternoon to charge or release Matthews and Phillips, who are being held on suspicion of murdering the teenager.
Yesterday detectives announced that body parts had been found during the search for the 16 year-old, who went missing from her home in St George nearly two weeks ago.
In total, seven people in their 20s are in police custody.