A group of Maoists opened fire on jawans guarding the helipad in a restive pocket in Pamed police station area, located around 500 km from Raipur, Bijapur Superintendent of Police K L Dhruv told PTI.
However, the rebels fled the spot as security forces launched a retaliatory attack on them, he said.
"A Chhattisgarh Armed Force jawan and another of district force sustained injuries in the incident," the SP said, adding that they were identified as Baburam Markam and Dinesh Ogre.
Security forces have launched a combing operation in the region to trace the attackers, the SP said.