TINSUKIA, Feb 12: In a tragic road accident, three persons died on the spot, including a child, and 12 others were injured, some of them critically, when an overloaded auto-rickshaw (AS 23 BC 6649) they were travelling in from Tinsukia to Pantola collided head on with a CRPF truck (MH 14 S / 9855) at Gobindopur by-pass junction on NH 37 under Panitola OP in Tinsukia district on Monday afternoon.