A class 12 student allegedly committed suicide in Delhi's Bakhtawarpur area.The deceased took the drastic step on Friday at her residence. "She did it because a neighbour used to stalk her and also threatened to kill her parents. Also, a suicide note has been recovered from the site," a relative said. A case has been registered under Indian Penal Code (IPC) section 306 (Abetment of suicide) and Protection of Children from Sexual Offences Act (POCSO) Act in the matter.