"The incident took place at around 4 pm when the chopper was flying approximately 4,000 feet above the ground over the jungles of Kanker," pilot of the helicopter Gopal Krishna Panda told PTI.
Kanker is located around 125 kms away from Raipur.
The Chief Minister had gone to Naxal-hit Sukma district to take part in a series of programmes. After attending the events, Singh and School Education Minister Kedar Kashyap left Sukma for the state capital in the chopper at around 3.15 pm.
The helicopter landed at Raipur at around 4.15 pm.
"An investigation has been initiated to ascertain the cause behind the snag," he said.