The National Investigation Agency (NIA) has filed a charge sheet against 23 people in the Maoist attack case in which 22 security forces personnel were killed in Chhattisgarh last year, an official said on Thursday.
The attack on April 3 last year near Tekalgudiyam village under Tarrem police station of Bijapur district had also resulted in injuries to more than 35 others, a spokesperson of the NIA said.
The case was initially registered at Tarrem police station and was later re-registered by the NIA on June 5 this year.
"Investigations revealed that the accused persons, who are members of the Communist Party of India (Maoist), conspired to commit terrorist acts and the armed cadres of the CPI(Maoist) attacked the combined security forces CRPF, CoBRA, DRG, and state police with a heavy fire of barrel grenade launchers (BGL) and automatic weapons.