Police probing Madeleine letter
Madeleine McCann has now been missing for more than a month
Police in Portugal are investigating an anonymous letter and a map claiming to show where missing four-year-old Madeleine McCann's body is buried.
The letter, sent to Dutch paper De Telegraaf, identifies an area 15km (9.3 miles) from where Madeleine vanished.
It strongly resembles another letter sent to the same newspaper last year, accurately pinpointing where two missing Belgian girls were buried.
Ch Insp Olegario de Sousa said officers were "checking the information".
'Everything necessary'
The Madeleine letter pinpoints a dirt track north of Odiaxere in the Algarve, according to De Telegraaf.
The paper said that the letter claims Madeleine, of Rothley, Leicestershire, is buried "north of the road under branches and rocks, around six to seven metres off the road".
Beside a cross and two question marks, the sender has written "vermoedelijke vindplaats Madeleine" - the place where Madeleine can probably be found.
Portugal map
Portuguese police would not confirm whether they had begun searching the area.
But Mr Sousa confirmed Portuguese police were aware of the map and were doing "everything necessary".
He said: "There have been exchanges between Dutch police and us.
"The information indicated an area 15km from the place of the disappearance of the little child. It is not far from Praia da Luz. We are checking the information like we check everything in this case for importance."
Asked if a search would include digging, he replied: "If the information gives us a precise location where we can look, we will do it."
Tip-off letter
The BBC's Caroline Hawley said it was difficult to assess the reliability of the map, given that Portuguese detectives had received hundreds of tip-offs which have not proved useful in the course of the investigation.
Officers also reported that the map was vague, she added.
Dutch police are studying similarities between the new letter and one received by De Telegraaf pointing to the whereabouts of Belgian step-sisters Stacey Lemmens, seven, and Nathalie Mahy, 10.
The girls were murdered in June 2006 after they disappeared from a late-night fair in the town of Liege.
On the day that the letter was received, police found their bodies at the spot indicated on an enclosed map.
A convicted paedophile, Abdullah Ait Oud, is now on remand awaiting trial for murder.
The Telegraaf believes the letter comes from the same sender because the phrase "vermoedelijke vindplaats" was also used in the tip-off letter last year about Stacey and Nathalie, BBC correspondent Alix Kroeger added.
__________________________________________________ ____
This looks slightly positive, even if it does sound like she's dead. Seems strange that this person knows a lot about the location of the two girls and the possible location of Maddy. If the police have already thoroughly searched the area and people have been watching out for suspicious activity it seems a bit wierd that she could be bured so close to where she was taken. Surely they should have noticed something, a hole or freshly dug earth or something.