Rao has been in custody since August 28, 2018, awaiting trial in the case.
Farmer leaders had on Thursday insisted that their ongoing protest against the Centre's new farm laws was 'apolitical'.
Rajan had sustained injuries recently after being hit by a bike while he was returning after a visit to his house at Anakkal in Ollur. Soon after he sought treatment at Koorkenchery, the teams of Intelligence Bureau (IB) and ATS took him in custody.
The improvised explosive device blast took place in the Chintalnar forest area of the Sukhma district.
Shuhaib, a former branch secretary of the CPM, has severed ties with the ruling party in the state following the arrest of his son.
The ABVP and others alleged the book glorified the ultras and was anti-national in content.
A civilised society cannot approve of the killings of Maoists, says the CPI.
Wayanad District Police Chief G Poonguzhali said that the group of armed Maoists fired at the Kerala police team. The IPS officer added that the police is yet to identify all members of the Left extremists gang.
Opposition leader Ramesh Chennithala has demanded a high-level inquiry into Velmurugan's killing.
The police identified the deceased as Velmurugan, 33, hailing from Tamil Nadu's Theni district.