An Afghan migrant who raped a mentally ill 15-year-old girl at a psychiatric clinic in Sweden has been found to have lied about being underage.

Convicted rapist Ali Bahmani claimed to be 16 years old, but a dental examination later found him to be 'at least 19.2 years,' court documents state.

The rape took place at a children's psychiatric clinic in central Stockholm where both Bahmani and the victim were inpatients, ten days before he had even applied for asylum.

Attack: Afghan migrant Ali Bahmani, who claimed to be 16, but was found to be 'at least 19', raped a 15-year-old mentally ill girl at a children's psychiatric clinic in central Stockholm (pictured)

Bahmani and the victim had been watching television with members of staff at the children's psychiatric care ward in Stockholm the evening of December 4, 2015.

When the staff left the room 'for a few minutes', Bahmani climbed on top of the victim, held her down on the sofa, and raped her, court documents state.

She later told police that: 'It happened so suddenly that she did not make a sound. She had not had sex "for real" before.

'When staff came into the room, Ali Bahmani jumped up and pulled up his trousers. She lay shocked in foetal position with her trousers around her ankles, she cried and was afraid.'

The teenager immediately accused Bahmani of sexually assaulting her, and police were called to the psychiatric clinic where he was detained.

Rape: Bahmani and the victim(not pictured), who suffers from PTSD and anxiety, had been watching television at the clinic, and when staff left the room 'for a few minutes', Bahmani raped her on the sofa

Bahmani denied rape, claiming the sex had been consensual because, while the victim had not spoken during the attack - and he admitted to noticing that she was crying during the assault - he said she told him she consented 'with her heart'.

'KILLER CLAIMED TO BE 15': MURDER OF SWEDISH SOCIAL WORKER ALEXANDRA MEZHER Sweden welcomed more migrants and refugees per capita than any other EU nation in 2015, with some 165,000 people arriving in the country. While asylum is granted to all refugees, asylum for migrants is needs-based and the application process can be long and arduous, particularly after the recent influx. However, all unaccompanied underaged migrants are automatically granted asylum in Sweden, and as a result, there have been several cases of new arrivals lying about their age. The rape in Stockholm took place just a few weeks before the well-publicized murder of Swedish social worker Alexandra Mezher. Miss Mezher, 22, was stabbed to death by a Somalian migrant at a refugee centre in Molndal, near Gothenburg in January this year. The centre housed unaccompanied underaged migrants, and Miss Mezher had stepped in to stop a fight between two residents. Youssaf Khaliif Nuur, who has been charged with murder and attempted murder, had originally claimed to be 15 years old, but is now believed to be 'at least' three years older. Advertisement

The victim told police that she had not spoken to Bahmani before the rape, apart from a exchanging a few sentences in English.

However, she had felt on several occasions that Bahmani had walked very close to her, and had raised this with both staff at the clinic and her mother.

Bahmani was formally arrested the following day, December 5, but documents from the Swedish Migration Agency shows that he did not apply for asylum in Sweden until December 14.

Bahmani claimed to have been born in Afghanistan in November 1999, but had no passport or proof of identification when he arrived in Sweden in the autumn.

An examination carried out during the investigation found that Bahmani had 'a teeth development showing a higher age, most likely over 19.2 years'.

In a police interview after his arrest, Bahmani admitted to officers that he was 19 years old, but later claimed to be 17 - neither of which collaborate with his supposed date of birth.

The 15-year-old victim had been admitted to the children's psychiatric clinic several times since April 2014, spending a total of four months as an inpatient.

At the time of the rape, the victim, who suffers from post-traumatic stress disorder and severe anxiety disorder, had been in their care since November.

It is not known why Bahmani had been admitted to the clinic, but a psychological evaluation during the investigation found him to suffer be mentally ill.

Bahmani has been sentenced to psychiatric care, after which he will be deported and banned from entering Sweden until 2026.