Police searching for Madeleine McCann have issued a description of a man seen walking close to her apartment on the night she disappeared.
The white man, said to be 35 to 40 years old, was seen at about 9.30pm on 3 May in Praia da Luz, Portugal.
He is said to be 5ft 10in, medium build with short hair, and wearing a dark jacket, beige trousers and dark shoes.
Police told a news conference the man was "carrying a child or an object that could have been taken as a child".
Ch Insp Olegario de Sousa urged the man or anyone who had seen him to come forward.
The description of the man was given by one witness involved in the case, he said, but would not elaborate.
Mr Sousa said witnesses were interviewed on Thursday and Friday "to confirm or invalidate" certain details.
Dozens of possible sightings of four-year-old Madeleine were still being investigated, but none had so far proved positive, Mr Sousa added.
A spokesman for Madeleine's parents, Kate and Gerry McCann, said they were pleased that there "appeared to be a new development".
"They will be taking time to consider what the police have said before making any comment," he added.
Earlier, the McCanns told the BBC of their guilt at not being with their daughter when she was abducted.
They said they were experiencing "every parent's worst nightmare" and loved her "more than anyone could imagine".
Madeleine was abducted from her bed in the Algarve resort on 3 May as her parents ate dinner at a nearby restaurant.
The McCanns said criticism of them for leaving her was "hard to deal with", but insisted that thousands of other people would have done the same "in such a safe resort".