UK police say they have received 1,000 images and 15,000 calls after an appeal to people who had been at the resort. The information is being assessed and will be passed on to Portuguese investigators.

Portuguese police did not give specific details of the tests conducted at the Lisbon branch of the national forensic institute.

Madeleine's parents, Gerry and Kate, spent Friday in Madrid, Spain, as part of a tour of several European countries to publicise the case.

The couple, from Rothley, Leicestershire, who met Pope Benedict in the Vatican City earlier this week, are due to visit the Netherlands, Morocco and Germany. They held meetings with the UK ambassador to Spain, Denise Holt, and Spanish Interior Minister Alfredo Perez Rubalcaba. There is speculation Madeleine could have been brought to Spain or passed through the country. The couple also appeared on a Spanish television programme called Los Mas Buscados . . . or Most Wanted . . . which appeals for help to find missing people.

Spain has been preoccupied by its own case of child abduction: that of seven-year-old Yeremi Vargas who disappeared in the Canary Islands two months ago. As well as making their own plea, they were given a letter from the family of Yeremi Vargas. They reiterated their appeal for information and urged people to visit their website, www. find madeleine. com.