Cops are investigating the mysterious death of a 15-year-old girl who fainted while having sex with a 26-year-old man.

The police announced they were investigating the death of Gabrielly Dickson Alves Nascimento, who died after suffering cardiac arrest in the early hours of Sunday, 1st August.

She was taken to A&E unconscious and bleeding from her private parts in the Brazilian city of Cubatao by an unnamed 26-year-old cleaner.

He later told the police he had been having sex with her inside his car when, during the act, he realised she was fainting, with her hands clawing up and her lips and skin going pale.

When she was admitted to hospital, the doctors realised she was suffering cardiac arrest, and they tried to resuscitate her, but their efforts did not succeed.

The nurses at the hospital said she showed no signs of violence. However, the police still registered her death as suspicious. In Brazil, the age of consent is 14.

The victim’s relatives said they were unaware of any pre-existing medical condition the teenage girl may have had.

They also said they were unaware of any relationship she may have been in with the man who took her to hospital.

At the time of reporting, the police were still awaiting results of the post-mortem, and they still had to question the victim’s relatives and other potential witnesses.

According to the victim’s friends, Gabrielly was studious, dedicated, happy and loved by all.