Police had nabbed Ali in a raid conducted in the Burdwan-Hatia Passenger train at Kita on August 20 and found around half a kg of explosive claimed as RDX, six country-made bombs, six timers, 24 gelatin sticks, four kg of urea and 250 gms of sulphur. The explosives were being transported from Burdwan (West Bengal) to Ranchi, said a source in the GRP. Subsequently, raids were also conducted at his house and seized computer and articles from the house.