The NIA team reached Jagdalpur town, 50km (31 miles) from the scene of the attack, on Monday evening.

BBC: India probes deadly Maoist ambush in Chhattisgarh

In the attack in Chhattisgarh state's Jagdalpur district, suspected Maoists triggered a land-mine blast and then opened fire at a convoy of Congress party workers and leaders who were leaving the area after a rally, police said.

WSJ: Suspected Maoists Kill 28 in Central India