Acting on a tip-off, police nabbed Chikkudu Praveen (24), Chikkudu Usha (20) and Killu Srinu from Kamayyapeta Road near Hukumpeta village, officials said.
The trio was part of an "action team" formed by banned CPI (Maoist) to disrupt the just-concluded election and hit specific targets, including political leaders, in Vizag agency region, District Superintendent of Police (Rural) Vikramjeet Duggal told the media here.
The police also seized a firearm from Praveen.
The three were involved in various offences, including killing of a police constable and some locals, setting afire to road-laying equipment, causing damage to public and private property and looting of ballot boxes during the local body elections in 2014, among others, police said.