New Delhi - A 16-year-old girl was gang-raped and apparently thrown from a moving train in the eastern state of Bihar, police said Monday.

The teenager was abducted near her home in Lakhisarai district by a group of six youth on Friday, regional police chief Ashok Kumar said.

She was sexually assaulted at an isolated spot before she was forced into a train at a local station and found hours later on the tracks, injured and unconscious, Kumar said.

The girl's family said she had been thrown off the train, a claim that police said it was investigating.

"The girl is being treated for serious injuries. We have arrested one of the suspects, a boy, in the case. Results of medial tests to confirm sexual assault are awaited," Kumar said.