Thiruvananthapuram: An empty KSRTC bus traveling the Sabarimala pilgrimage route in Kerala caught fire early Sunday morning. The bus was making its way from Pampa to Nilakkal to collect Sabarimala pilgrims when the fire ignited. The incident took place at around 5:30 a.m. at the 30th hairpin bend on the wooded path between Chalakkayam and.