TINSUKIA, June 24: In a tragic road accident, two bicycle riders died on the spot after their bicycle collided head-on with a Sadiya-bound private bus ‘yan Moni’ bearing number AS03 5394 at Sukanpukhuri near Shivdham on the outskirts of Tinsukia town at around 1.30 pm on Saturday. The deceased have been identified as Robin Pator (16), son of Mahendra Pator and Ramesh Kumar Thakur (18), son of Paresh Kr Thakur. Both were residents of Sukanpukhuri.