More than 60 women are in hospital after suffering complications from the surgery over the weekend and 24 of them are seriously ill, authorities in the central state of Chhattisgarh said.
"Reports of a drop in pulse, vomiting and other ailments started pouring in on Monday from the women who underwent surgery," said Sonmani Borah, the commissioner for Bilaspur district where the camp was held.
"Since Monday, eight women have died and 64 are in various hospitals," he told AFP by telephone.
State governments in India frequently organise mass sterilisation camps under a national programme whereby women are given 1,400 rupees as an incentive to undergo the procedure.
Under pressure to meet targets, some local governments also offer other incentives such as cars and electrical goods to couples volunteering for sterilisation.
Although the surgery is voluntary, rights groups say the target-driven nature of the programme has led to women being coerced into being sterilised, often in inadequate medical facilities.
Chhattisgarh Chief Minister Raman Singh ordered four top health officials suspended over the deaths, while a police complaint was lodged against the surgeon who performed the operations.
Singh also announced compensation of 400,000 rupees for the each of the families of those women who died.
Angry residents took to the streets of Bilaspur where many of the women have been hospitalised demanding action against those responsible.
The women had undergone laparoscopic sterilisation, a process in which the fallopian tubes are blocked usually under general anaesthesia.
The Indian Express daily said the surgeries were carried out by one doctor and his assistant in around five hours.
"There was no negligence. He is a senior doctor. We will probe (the incident)," the chief medical officer of Bilaspur R.K. Bhange told the newspaper.
The medical superintendent of the main hospital in Bilaspur said it was difficult to say what could have caused the deaths.
"It would be premature to speculate on the reasons for this tragedy. We are giving priority to treating the women admitted here as their blood pressure has gone down," Ramnesh Murthy told reporters late Monday.
"We will know the reasons only once the post-mortem is completed."
Last year, authorities in eastern India came under fire after a news channel unearthed footage showing scores of women dumped unconscious in a field following a mass sterilisation.
The women had all undergone the procedure at a hospital that local officials said was not equipped to accommodate such a large number of patients.
In 2011, the government issued guidelines outlining the standard operating procedures for sterilisation services in camps.
But a 2012 report by Human Rights Watch urged the government to set up an independent grievance redress system to allow people to report coercion and poor quality services at sterilisation centres.
It also said the government should prioritise training for male government workers to provide men with information and counselling about contraceptive choices, but despite the recommendations to the national government, problems persist on the ground.
India's family planning programme has traditionally focused on women, and experts say that male sterilisation is still not accepted socially.
Government figures from 2008 show that around one third of the 54 percent of the population that reported using any form of family planning opted for female sterilisation.
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Human beings are treated worse than cattle in many places and by many in India. The doctors who perform free surgery treat them even worse as if they are doing a great favor to the patients. There have been many instances where patients have gone blind after undergoing free cataract surgery. Human values should change but who will take the initiative? Media should keep highlighting these instances, repeatedly and tirelessly until it awakes conscience and corrective measures are taken. It is a big shame on India.