A 55-year-old security guard of the South Calcutta Law College in Kolkata’s Kasba area has been arrested on Saturday in connection with the alleged rape of a first-year law student, making it the fourth arrest in the case so far.

The development comes two days after the 24-year-old law student accused three people of sexually assaulting her in the college’s security guard’s room.

According to the survivor, two men watched as a third raped the woman, shortly after having bullied the guard, Pinaki Banerjee, into leaving.

The horrific incident took place on June 15, and came to light on Friday, sparking widespread outrage.

The Kolkata police have arrested the three accused – Manojit Mishra, a 31-year-old former student of the college, who is now a practising lawyer – and two students, identified as 19-year-old Zaib Ahmed and 20-year-old Pramit Mukhopadhyay. The prime accused, Monojit Mishra, is a member of the Trinamool Congress’ student wing.

The survivor said the three accused – whom she identified with initials ‘J’, ‘M’, and ‘P’ – cornered her around 7:30 pm on June 15 after a meeting of the ruling Trinamool Congress’ student wing. ‘M’ and ‘P’ locked her in a room with ‘J’, who tried to rape her.”I fought back…I cried and asked him to let me go. I even touched his feet, but he didn’t let me go. He tried to force me with the intention of having sex. I kept pushing him back. I asked him to let me go. I said I can’t do this, I have a boyfriend and I love him,” she said.