From BBC News:
The teenager was accused of having an affair with a married man, police say, and the punishment was given under Islamic Sharia law.
Hena Begum’s family members said a village court consisting of elders and clerics passed the sentence.
She was alleged to have had the affair with her cousin and received 80 lashes.
The family members of the married man also allegedly beat the girl up a day before the village court passed the sentence in the district of Shariatpur.
“Her family members said she was admitted to a hospital after the incident and she died six days later. The village elders also asked the girl’s father to pay a fine of about 50,000 Taka (£430; $700),” district superintendent of police, AKM Shahidur Rahman, told the BBC.