Bomb disposal experts have confirmed that RDX was used in Thursdayâs blast on the Delhi-bound Shramjeevi Express, which killed 14 people on the spot and injured nearly 64 others. The explosion occurred in a general coach of Sharamjeevi Express near Jaunpur district in Uttar Pradesh. Authorities say they suspect that RDX used on the train was part of the consignment used in the attack in Ayodhya earlier this month.Shramjeevi Express, which reached Delhi yesterday afternoon, left the damaged bogey at Harpalganj Station near Jaunpur. Union Railway Minister Lalu Prasad Yadav visited the site of the blast late last night and announced relief measures. âThe people who have been targeted are all poor people, workers and laborers. A full investigation will have to be carried out,â Lalu Yadav said.