The train left Bangkok on Friday night with 415 passengers, many of whom were foreign tourists. It derailed at around 3am yesterday in the 382-metre-long Khao Pleung tunnel, located between Ban Pang Ton Phueng in Uttaradit and Huai Rai Station in Den Chai, Phrae.
The six carriages ended up leaning against the tunnel wall; however, its five leading carriages were undamaged and able to resume their journey to Den Chai. The affected passengers were transported by rail trolleys to Sila-at Station, where 15 buses took them to Chiang Mai and other destinations. The derailment caused Bangkok- and Chiang Mai-bound train services to be suspended for hours to allow for track repairs.