Updated

The parents of missing British toddler Madeleine McCann released on Thursday the last known photograph of their daughter before her abduction three weeks ago.

The picture shows her smiling and dangling her feet into a swimming pool.

Madeleine, who has turned four since her abduction, is shown enjoying her holiday less than eight hours before she was snatched from her bed.

The picture was taken by Madeleine's mother Kate, 38, on her own camera.

Madeleine is shown smiling, wearing a pink smock top, white shorts and a sun hat as she cools her feet in the swimming pool.

The picture was taken at 2:29 p.m. on May 3 — Kate McCann's camera clock is one hour out so the display reads 1:29 p.m.

Less than eight hours later, before 10 p.m. that night, Madeleine disappeared. She had been sleeping in the family's holiday apartment in Praia da Luz, Portugal, when she was taken away.

Police in the Algarve holiday resort have re-questioned two people over Madeleine's disappearance, but no arrests have been made.

But with no news on their daughter, the McCanns are now thought to be planning a European tour in a bid to spread their daughter's image across the continent in the hope that she will be spotted and rescued.

Backed by an army of friends and family in Portugal and Britain, the campaign has attracted the attention of at least 115 million web users.

On Wednesday, the McCanns were showered with kisses and hugs as they left Portugal's holiest site in the town of Fatima before praying privately for almost an hour in a separate chapel.