Portuguese police are dropping their investigation into the disappearance of Madeleine McCann due to a lack of evidence, media reported Tuesday. Two Portuguese newspapers said the Public Prosecutor's office intended to call off their search for the British girl before July 14, when the customary official secrecy period covering the investigation ends. Police could reopen the case if new evidence emerges, the papers said. Madeleine McCann went missing in Portugal's southern Algarve region during a family vacation in May last year, a few days before her fourth birthday. Detectives named her parents, Kate and Gerry, and local man Robert Murat as formal suspects in the case. All denied involvement in Madeleine's disappearance.