The incident took place when the party was returning after concluding polling near Nayanar village of Katekalyan police station limits, a senior official said.
The ultras opened indiscriminate fire on members of the polling team leaving B Joseph of 186 CRPF battalion, who was with them, dead.
The ultras opened indiscriminate fire on members of the polling team.
Naxals fled into the jungle after the CRPF men launched retaliatory attack, the official said.
Additional forces were rushed :to the spot after the news of the incident. The polling staff was reported safe and brought out of the jungle, the official said.