1 March 2015 Last updated at 15:16

Becky Watts search: Police call in further support




81306522 44f1cd2c 7588 4f18 8341 0027a12a2e8e - Becky Watts seaarch Police in further support Rebecca Watts was reported missing 10 days ago
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The search for 16-year-old Becky Watts from Bristol is being intensified, according to police.
More resources are being called upon in the search for Becky, reported missing from her home in the St George area of the city on 19 February.
Detectives are still questioning two people arrested on Saturday in connection with her disappearance.
Meanwhile, police say a laptop computer found by search teams in woodland on Saturday is not related to the inquiry.
81324406 8cbcd455 506d 4875 9a35 5fc2ad9bfc7a - Becky Watts seaarch Police in further support A search team arrived at Royate Hill allotments in Fishponds on Sunday
A number of locations have been searched within a 2km (1.4 mile) radius of the family home in Crown Hill.
Avon and Somerset Police said it was now running six specialist search teams, including officers from Wiltshire, Devon and Cornwall and Gloucestershire forces.
On Monday the police helicopter will be involved again, as will a dog unit from South Wales Police.