"The PM spoke to Chhattisgarh CM @drramansingh on the unfortunate tragedy in Bilaspur. The PM expressed concern over the tragedy," said a tweet by the prime minister's office (PMO).
"The PM has asked @drramansingh to ensure a thorough investigation & action in the entire issue," said another tweet.
In addition to the dead, over 50 other women were hospitalized due to botched surgeries at a sterilisation camp organized by the state government in Chhattisgarh's Bilaspur district.
Four health officials including chief medical health officer of Bilaspur have been suspended.