Unidentified miscreants entered the premises of state-run RG Kar Medical College and Hospital here shortly after midnight on Thursday and vandalised portions of the medical facility, where the body of a woman doctor was found last week, police said. The incident took place amid midnight protests by women against the horrific rape-murder of the doctor at the hospital. According to the police, a group of nearly 40 people, allegedly disguised as protestors, entered the hospital premises, vandalised property and pelted stones at police personnel prompting them to fire teargas to disperse the mob. A police vehicle and a few two-wheelers at the spot were also damaged in the incident, they said. Some police officers were injured in the violence, an officer said.