At least 100 Naxals are suspected to be involved in the attack in which a BJP MLA and four security personnel were killed in Chhattisgarh's Dantewada district, a police official said on Wednesday.
Police have also recovered a GPS device of Naxals from the site in which the rebels had set the location of the Improvised Explosive Device (IED) used in the incident.
Bheema Mandavi, the BJP MLA from Dantewada seat, and four personnel of his security staff were killed when Naxals blew up their vehicle near Shyamgiri village on Tuesday, just two days before the first-phase of the Lok Sabha polls