A senior Portuguese police officer has said detectives investigating Madeleine McCann's disappearance have a "positive feeling" about the inquiry as they await key DNA test results.
Chief Inspector Olegario Sousa's comments came amid reports that Madeleine's parents have been told not to leave Portugal amid hopes of a breakthrough.
Police will step up the hunt for the young girl this week by launching fresh searches, according to unconfirmed reports.
Mr Sousa, spokesman for Portugal's investigative Policia Judiciaria (PJ), said: "We have already said that all the lines are still open. Even our director (PJ head Alipio Ribeiro) said that we haven't enough information to make the picture of what happened that night. But we are with a positive feeling on this."
It was widely reported that the McCanns, from Rothley, Leicestershire, had been told it would be bad timing to leave Portugal with important developments expected.
The couple are not suspects and it was believed they were making plans to leave Praia da Luz and return home in the middle of next month.
British detectives and sniffer dogs sent to Portugal to help with the inquiry discovered blood stains in the McCanns' flat three weeks ago.
A spokesman for the Forensic Science Service (FSS) in Birmingham, which is carrying out the analysis, said that experts were "continuing to examine" the samples taken from the apartment.
Neither Mr Sousa nor the FSS could confirm when the tests would be completed.
Pressed to say whether the picture of what happened on the night Madeleine vanished was becoming clearer, Mr Sousa answered: "Yes, you might say so."
PA