The deceased, 14-year-old Nila Roy, was the daughter of Narayan Roy and a 10th grader at a local school.
Police said that stalker Mizanur Rahman used to disturb and pester the victim.
After the girl rejected his unwelcome advances again on Sunday night, Mizanur hacked him with a knife, leaving her critically injured.
Locals rescued Nila and took her to Enam Medical College Hospital where doctors pronounced her dead, said police.
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