Here's Bloomberg's summary of what happened.
An Indian surgeon used infected instruments to sterilize 83 women in about six hours, according to a local medical official, leaving 10 [now eleven or more] of
them dead and another 69 hospitalized in the central state of Chhattisgarh.
The doctor breached guidelines that limit surgeons from performing more than 30 sterilizations a day, said the official, who asked not to be named because details of the investigation are private. He also failed to disinfect the instruments before using them again, the official said.