A college student has accused another of raping her at the point of a knife. Both go to the same college in Chembur. Pankaj Mishra,20,who is doing a management course,was arrested after the girl,17 and a mass media student,alleged he had raped her at his home last week when she had visited him for help in a study project. We have arrested Pankaj Mishra,student of Bachelor of Management Studies (BMS). The girl student lodged a complaint with us on Sunday,alleging he had offered to help her with a project and called her to his home in Chembur Camp on July 21,locked her in,raped her,and finally let her go the next morning. According to the girl,Mishras parents were away, said BB Rathod,senior inspector,Chembur police station. According to the girls complaint,she had met Mishra on Facebook a month earlier and became friends after learning that they were studying in the same college. They starting chatting on the phone and met after their college reopened. The girl would discuss her studies with Mishra. He allegedly offered to help her with a project and invited her home on July 20. That day,they chatted,surfed the Net and watched television. Mishra allegedly asked her to come back the next day, Rathod said. She arrived on July 21 and worked with him for a few hours. According to her complaint,she was about to leave after studying but Mishra refused to let her go. When she protested,he threatened her with a knife,locked her in a room and went out to get food. He allegedly raped her at night and let her go the next morning. According to the girl,her mobile phones battery had died out and she could not call anyone for help, Rathod said. The police have booked Mishra for rape,criminal intimidation and wrongful confinement. Mishras father reportedly works in the same college and the police are probing where the parents of both students were on those two dates. They have seized the knife Mishra allegedly threatened the girl with. College officials said they would take action only if the investigation throws up any evidence to back up the allegations.