Maoists had used 27-30 kg of explosives during the recent attack on the Congress convoy in Chhattisgarh, according to media reports.
Reportedly, the initial forensic report revealed that Naxals used commonly found explosive ammonium nitrate for the blast.
The report further reveals that electric detonators with command wire were used by the Naxals to trigger the blast which left a big hole on the road and slowed down the convoy of the Congress leaders.
Reportedly, 200-meter long wires were used to detonate the explosives when the convoy of the Congress leaders reached the spot.
The Maoists fired on the convoy after the blasts.
The attack which took place at Darbha Ghati, a few kilometres from Jagdalpur in Chhattisgarh left Congress leader Mahendra Karma, Chhattisgarh Congress chief Nand Kumar Patel and his son Dinesh and former MLA Uday Mudaliyar dead. Many security personnel were also killed in the attack.