LONDON - The parents of Madeleine McCann, the 3-year-old British girl who vanished during a family vacation to Portugal in 2007, say they are still hopeful they will one day be reunited with their daughter as they mark the 10th anniversary of her disappearance.

In an interview with the British media released on Sunday, the McCanns said they felt encouraged by the "real progress" that British police have made in the case in the past five years.

Scotland Yard said last week that, a decade later, detectives are still pursuing "critical" leads to trace Madeleine, who disappeared from a vacation home in Portugal's Algarve region on the night of May 3, 2007. Her parents had gone out to a tapas bar nearby after putting her and her twin siblings to bed.