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Becky Watts' stepbrother and his girlfriend 'held over her murder'

Becky Watts' stepbrother and his girlfriend are reportedly being held by police over the 16-year-old's murder.

Nathan Matthews, 28, and Shauna Phillips, 21, have been named in several newspaper reports as the two arrested in connection with her alleged killing.

Officers were last night granted a further 24 hours to question them but must either charge or release them by this afternoon.

A further four men and one woman have also been arrested on suspicion of assisting an offender.

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Becky Watts: Police appeal for sightings of car

Police investigating the disappearance of Becky Watts have appealed for witnesses who may have seen a black Vauxhall Zafira in the "critical time period" when the 16-year-old went missing.

An image released by police of the type of car they wish to trace. Credit: Avon and Somerset Police

Detectives said they had already seized the vehicle, with the registration plate HY06 HYA, but wanted to piece together its movements between the morning of Thursday 19 February until Monday 23 February.

"The critical time period is from the morning of Thursday 19th February until Monday 23rd February.

"We are, however, keen to speak to anyone who saw this vehicle in the days either side of this."

Police said they were also keen to speak to any previous owners of the vehicle as a "matter of urgency".

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