In Chattigarh, a search operation has been launched following the naxal attack on policemen in the Dantewada district last night. Police have recovered two bombs from the site of the landmine blast near Kirandool, in which four policemen including a sub-inspector were killed. Senior police officials have rushed to Kirandool for follow up action. Our correspondent reports, the injured jawans have been admitted to the local hospitals in the district.