Police in Malta will today continue checking reported possible sightings of missing four-year-old Madeleine McCann.

On Friday two more people reported seeing the child on the Mediterranean island.

But officers said their inquiries have so far come to nothing.

There have been 11 alleged sightings of Madeleine on Malta dating back to May 27.

Some witnesses have said she was with a man, others with a woman.

One man took a picture of a child he believed to be Madeleine at a parish feast in the central town of Zejtun on June 17.

On examination, though, it proved not to be her.

In a statement Maltese police said officers were checkling all the reported sightings, although all have "so far yielded a negative outcome.

"However, investigations are still actively in progress in order to shed more light upon the reported sightings."

As an additional measure, officers have been stationed at ports to check people leaving the country.

A spokeswoman for Madeleine's parents, Gerry and Kate McCann, said they would not consider he alleged sightings in Malta until any are officially confirmed.

She added: "There are lots of reports. If they got that emotionally involved with each one, they wouldn't be able to concentrate on the campaign."

Madeleine was snatched from her bed in her family's holiday flat in the Portuguese resort of Praia da Luz on May 3.

Her parents have launched an international information drive to promote awareness of her disappearance.

On Friday, green and yellow balloons were released in 50 countries to mark the 50th day since her abduction.