India police fire tear gas, water cannon at protesters

At least 100 protesters "have been arrested on the charge of creating violence", a senior police official told AFP on condition of anonymity as they were not authorised to speak to the media.

Numerous protests in Kolkata prompted by the crime have transformed into unruly political rallies, with police scuffling with demonstrators from the ruling Bharatiya Janata Party (BJP) angry at the state government.

The Hindu-nationalist BJP is the party of Prime Minister Narendra Modi, but it is an opposition party in West Bengal, of which Kolkata is the capital.

They have accused Banerjee's government of creating an unsafe environment for women that allowed crimes including the doctor's murder to occur.

The woman's body was found in the teaching hospital's seminar hall, suggesting she had gone there for a break during a 36-hour shift.

Doctors' associations in many cities launched strikes over the murder that cut off non-essential services, though medical professionals have since returned to work.

One man has been detained over the crime.

The gruesome nature of the attack has invoked comparisons with the horrific 2012 gang rape and murder of a young woman on a Delhi bus.

That incident sparked widespread outrage in a country where sexual violence against women is endemic, with an average of nearly 90 rapes a day were reported in 2022 in the country of 1.4 billion people.