A ninth grader was found dead in her house at Shanir Akhra in the capital on Saturday.
The deceased was identified as Samia Akter Dia, 15, a student of Dania Bornomala High School and daughter of Anwar Hossain of Palashpur area.
Nazmul, brother of Samia, said after evening, she went to the bathroom and locked the door.
When she did not respond for a long time, family members broke the door and found her hanging with a scarf wrapped around her neck.
She was quickly rescued and taken to Dhaka Medical College Hospital where doctors declared her dead on arrival.
Inspector Md Faruk, in charge of the DMCH police camp, said the body has been kept at the hospital morgue and Kadamtali Police Station has been informed of the incident.