The medical report of the 24-year-old student allegedly raped inside a law college campus in Kolkata has confirmed several abrasion marks on her body and said that “sexual assault cannot be ruled out”.

According to the report, the alleged incident took place between 7.30 pm and 10.50 pm on Wednesday. The survivor’s medical check-up was held at 10 pm on Thursday.

The medical report states: “Abrasion marks around the neck seen.” It adds that “few marks over the….. (private parts) seen”, and states that “sexual assault cannot be ruled out”.

The report highlighted that three swab tests were undertaken.

Four people have been arrested so far in connection with the alleged incident that took place on Wednesday. While three people, including Monojit Mishra, the prime accused who is a former leader of the Trinamool Congress’s student wing and an ex-student of the college, Zaib Ahmed, and Pramit Mukherjee, were arrested earlier, Pinaki Banerjee, a security guard at the college, was arrested on Saturday.

While the TMC has claimed that Mishra is no longer associated with the party, Ahmed and Mukherjee are allegedly members of the college’s Trinamool Chhatra Parishad unit and Mishra’s associates.

The police said Mishra allegedly sexually assaulted the woman while the other two locked the door of the room from the outside.

The incident has come in the backdrop of Kolkata witnessing widespread protests over the rape and murder of a trainee doctor in a state-run R G Kar Medical College last year.