An Afghan asylum seeker in Germany has fled to Sweden and registered under a new identity after being accused of sexually abusing the four-year-old daughter of the family caring for him.

The case of Ahmed M., who claimed to be just 12 when he entered Germany in 2016, is another sorry tale of abused trust and bureaucratic blunders that have left him free and the girl he allegedly abused in therapy.

He was taken in by a Catholic family in Berlin, along with several other Afghan minors, shortly after he arrived.

In July last year he was left alone for the afternoon with the family's toddler daughter Emily.

Ahmen A, an Afghan asylum seeker in Germany is accused of sexually abusing the four-year-old daughter of the family that had taken him in

The next day the child told her mother she had spent the time playing 'doctor and nurse' with Ahmed.

She was taken to see a specialist doctor at the clinic for Children's and Juvenile Medicine in nearby Buch.

The clinic stated in a report: 'Urgent suspicion of sexual abuse.' And the victim indicated it was not the first time she had been abused by the refugee who claimed to authorities he was born on January 1 2004 in Kabul.

Other Afghan refugees in the home of the family reported they had seen him abuse her in the past and a police probe was opened.

Officers noted how tall he was, the fact that he had the beginnings of a moustache and seriously doubted his claim to be just 13 at the time of the alleged abuse of the girl.

Ahmed is believed to have fled to Malmo in Sweden where he has registered as a refugee using the name Ahmed M. - and claimed he was born in 2005

At 13 he was under the age of legal responsibility but prosecutor Corinna Gögge rejected a plea from Emily's father to force him to undergo a test to determine his age. Later, because he denied the allegations, the enquiry was dropped.

In December last year Germany issued him with new temporary residency papers stating was born six months later than he originally stated.

Soon after he fled to Malmo in Sweden where he has registered as a refugee using the name Ahmed M. - and claiming he was born in 2005.

The family in Germany who took him in have asked Sweden to investigate him. So far there has been no response from Swedish authorities.