"Maoists are the ones who kill innocent people and collect money from them. They cannot be seen as Communists.... This is my personal opinion," he said.
Mani was replying to queries on the controversy regarding the killing of two Maoists-Kuppuswamy Devaraj (65), a central committee member of the outlawed outfit, and Ajitha (45), in an alleged encounter with police in Nilambur forests in Malappuram district on November 24.
Mani said the government had ordered a magisterial probe into the incident and "let the probe continue. I will react further on the issue after that."
Meanwhile, when reporters sought PWD Minister G Sudhakaran's reaction over the incident, he said it might not have happened with the knowledge of Chief Minister Pinarayi Vijayan, who holds the Home portfolio.
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"The government has already ordered a probe and the truth will come out soon," he added.
Meanwhile, BJP state president, Kummanam Rajasekharan, said the state government should "remove the mystery behind the encounter killings".
"The police version on the two Maoists being killed in the encounter is not credible. Government is keeping mum on the issue," he added.