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A team of forensic officers will use radar equipment to look underground for clues to her disappearance, London's Mirror newspaper has reported, citing police sources.
Madeleine's parents, Kate and Gerry McCann, have been told of the plans to search three sites near the Praia da Lux resort but are not expected to go to Portugal.
Three-year-old Madeleine went missing from her bed on May 3, 2007, during a family holiday in Portugal.