Maoists killed two CPI(M) activists at Sindurpur village in Purulia district, police said on Tuesday.
A group of about 50 Maoists raided the house of one Hrishikesh Kumar, 58 and kidnapped him along with his son Kashinath, 30, on Monday night.
They then shot them dead in a nearby jungle, police said. Maoist posters found near the bodies recovered on Tuesday morning said that the duo had been killed as they were acting as police informers.