Police investigating the disappearance of Madeleine McCann are looking into a possible sighting of the girl with a suspect’s girlfriend, the London Daily Mail reported Monday.

A witness believes he saw the girl with a man and a woman in Portugal two days after she vanished and had identified the woman as Michaela Walczuch, the German-born girlfriend of suspect Robert Murat, the Mail reported.

Click here to read the Daily Mail report.

The witness, who has not been identified, told police that the couple was behaving suspiciously, and looked as if they were trying to hide the child, the Mail reported.

The report follows certainty by an investigator hired by the McCann family that Madeleine is alive and that he is close to finding her.

Madeleine disappeared from her family’s vacation home in Praia da Luz, Portugal on May 3 while her parents were dining with friends close by. Her parents have been on-again, off-again suspects in Madeleine's disappearance.