The friend, a teenaged boy, told the police that he took the girl to the Anwer Khan Modern Hospital on Thursday afternoon after she “started to bleed”.
The doctors declared her dead on arrival and called the police.
Sazzadur Rahman, a deputy commissioner of Dhaka Metropolitan Police, said they were questioning the boy and two other male friends of the girl who rushed to the hospital on hearing about her death.
Thakur Das Malo, inspector at Kalabagan Police Station, said they were “almost certain”
We have collected some pieces of evidence from the home,” he said and added that the girl’s family have alleged she was raped and killed.
The police said she left home saying that she would study with her friends, but went to the home of the boy who was alone at that time.
Sazzadur said they were waiting for the post-mortem examination report.
The family did not press charges until Thursday night.