Police on Thursday detained nine youths in connection with the case. According to police, the incident took place when the girl, 17, was travelling on a scooty along with her boyfriend, on Wednesday night.
The couple was intercepted by a group of youths who held the girl`s boyfriend captive and gang-raped her. Later, she fell unconscious. Police said she was unconscious for over 12 hours.
She is being treated in a Dumka hospital. Police sources said that the girl`s boyfriend has identified three of the eight youths.
Dumka police have constituted a team to probe into the incident.