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"The investigation team are working around the clock to locate those responsible for this crime and we will continue to do so until they are brought to justice.

"We have written to the 400 residents of Iron Acton to reassure them of our determination to solve a crime that is completely out of character for this safe area of South Gloucestershire.

"It asks anyone who has remembered any incident from the night of Wednesday April 28 – however seemingly insignificant – to contact us on 0117 945 4057."