"The aim behind this attack was to kill Mahendra Karma and other Congress leaders. During the two-hour long gun battle between commanders of CPI (Maoist) and security forces, some innocent people and low-level Congress workers were killed.
"They were not our enemies but they lost their lives. We express regret over their death and offer our condolence to the bereaved families," said Gudsa Usendi, spokesperson of 'Dandkaranya Special Zonal Committee' of CPI (Maoist), in a statement.
The outfit accused senior Congress leader V C Shukla, who sustained serious injuries in the attack and at present undergoing treatment in a hospital in Gurgaon, of playing an "active role" in framing pro-industrialist measures in the state.
"Karma, who has been called a tribal leader, is from a feudal family of Manjhi caste. His family has been traditional oppressors of the tribals," Usendi said in the statement seeking to justify the killing.