A 15-year-old girl died in a car accident while having sex with a 26-year-old man.

The kid is believed to have died of an apparent heart attack, however the findings of a post-mortem are still pending.

On Thursday, July 29, Gabrielly Dickson Alves Nascimento was transported to the hospital after the anonymous male noticed she had passed out while they were having sex.

He informed authorities that he was having sex with the youngster when her lips and complexion turned pale and her hands spasmed behind her.

Doctors at the the UPA Jardim Casquiero medical facility in Cubatão, São Paulo, diagnosed a cardiopulmonary arrest but were unable to save Dickson, and she died in the early hours of the following morning, July 30.

An initial medical examination found blood in the girl’s vagina, but there were no other indications of a physical assault.

The older man, described as a “general services assistant” is not believed to have been charged with any crime because in Brazil, the age of sexual consent is 14.

Friends, family and neighbours have paid tribute to the teenager via social media.

The girl’s friends and classmates described her as hard-working, dedicated, happy and loved by everyone.

Dickson’s final post on Twitter, shared just two days before her death, read: “Who is it that hates me?”