Police investigating the disappearance of Madeleine McCann are reportedly cross-examining soil from a reservoir searched a fortnight ago with samples from a camper van belonging to the prime suspect.
Search teams spent three days in late May scouring the Barragem do Arade reservoir in southern Portugal, about 30 miles from where the three-year-old went missing during a family holiday in the resort of Praia da Luz in 2007.
