"The attack took place at the Doordarshan TV tower at Marenga village under Parpa police station in the district this morning, leaving three police personnel killed and one injured," Inspector General of Police (IG) Bastar Range Himanshu Gupta said over phone.
Marenga village is around 15 km from Jagdalpur, the district headquarters.
The injured jawan has been referred to Raipur for treatment. Security forces have launched a search operation in the region to nab the attackers.