A trainee doctor was raped and killed, sparking protests in several cities and an attack on a medical college campus as doctors and paramedics in several cities across India demand better and safer working conditions.

Scores of people went on a rampage at a medical college campus in eastern India, attacking vehicles and ransacking patient wards Wednesday night, police said Thursday. Police did not identify who was behind the rampage, but media reports said several police officers were injured and police fired tear gas in the Wednesday night clash at the R.G. Kar Medical College in Kolkata, the capital of West Bengal state.

The unrest began when police said a 31-year-old trainee doctor was found raped and killed Friday. A police volunteer was arrested in connection with the crime, and police handed the case to federal investigators following a court order.

Government hospitals in several cities across India have since suspended medical services except for emergency departments as protesters demanded justice, claiming that it was a case of a gang rape and more were involved.