An 18-year-old student of Bharati College in west Delhi's Janakpuri area allegedly committed suicide on Wednesday in the institute's washroom, police said.
She was rushed to a hospital after she was found unconscious in the toilet by college staff. The hospital's authorities declared her brought dead, they said.
Some girls heard the woman crying inside the toilet. They tried to open the door and even called out to her, but there was no response, according to a source in the college.
They informed a teacher, who was taking a class at that time, and rushed to the washroom along with some other college staff. They broke open the door and found her lying unconscious, the source said.
Police said it is suspected that the woman, a resident of Najafgarh, consumed a pesticide.
They said a bottle of pesticide was found from the spot and a paper-cutter knife from her bag.
The teen was a second-year BA student at the college, Vijay Kumar, Deputy Commissioner of Police (West), said.
No suicide note was found and it is yet be ascertained as to why she took the step, police said.
Police officials have spoken to the woman's father, elder brother and younger sister, who expressed shock over the incident. They did not level any allegation.
The woman's mother was admitted to the Deen Dayal Upadhyay Hospital after she fainted seeing her daughter's body, they said.
Police have conducted a search of the woman's house and, according to them nothing suspicious was found. Her call detail records are being examined.
"Her friends and college teachers said she was quiet and not a very confident woman. She was always found busy watching videos and movies on her phone.
"She also used to miss classes frequently. Today, she had gone to the college, but did not go to her class," another officer, privy to the probe, said.
The source said the teen was an average student and had scored around 58 per cent in her exam.
The Bharati College, in a statement on their website, urged students to reach out to their teachers.
Students were also advised to contact teachers to share their concerns, according to the statement.
The college's principal also interacted with faculty members and urged them to notice behaviourial changes in students, the source said, noting that the woman had very good handwriting.
"With a heavy heart, I have the sad duty to announce the unfortunate demise of one of our students today. I take this opportunity to strongly reiterate that the college is a family.
"All members of this family are committed to helping each other. Students especially can reach out to their teachers to share their concerns and difficulties. We are there for you," according to a message from the principal.
The statement said, "This is a difficult moment for the family of the bereaved and we request everyone to respect their privacy in this moment of grief."
The college will organise a session for students tomorrow to counsel them.
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