The deaths of 13 Indian women from what are suspected to be botched sterilizations at the weekend have caused outrage among their families and sparked protests in the local community.
The authorities in the state of Chhattisgarh in central India have ordered an inquiry.
A seven member team of doctors from New Delhi have arrived in the district to investigate what went wrong.
At least 60 other women remain in hospital, many in a critical condition.
Local health officials have denied any responsibility for the deaths but some suggest medics were under pressure to perform as many sterilisations as possible.
Authorities in India have for decades promoted the procedure as a form of family planning and the operations are carried out in make shift clinics .
Latest reports say another woman has died and 15 others have been taken to hospital following the same procedure.
The local government has registered with police a case of causing death by negligence against the chief doctor who carried out more than 80 sterilisations last Saturday.