Police were called to the scene, near the Srisoonthorn Municipality offices, at about 3:15am.
Officers and rescue workers ‒ from the Kusoldharm Foundation along with a Srisoonthorn Municipality Rescue Unit and a team of paramedics from Thalang Hospital -- arrived to find a white Isuzu D-Max 4-door pickup truck that had veered off the road and onto the central reservation.
The pickup had struck a traffic sign before colliding with a palm tree. The force of the impact had torn the tray from the back of the pickup.
Three male teenagers were discovered injured inside the wreckage. Authorities identified the victims as 19-year-old Nattawut Chahajak as the driver, with Thanawat Songsri, 18, and a 17-year-old as his passengers.
Emergency crews provided first aid and rushed them to Thalang Hospital for further treatment.
Police were later informed that Mr Thanawat and the 17-year-old had succumbed to their injuries, while Nattawut remains hospitalised.
Investigators believe the accident occurred as a result of high-speed driving, with the truck’s speedometer frozen at 150km/h at the time of the crash.
The police report noted that officers believed the pickup had started hydropaning on the wet road, leading to the crash.
Witnesses reported that the vehicle had been speeding in rainy conditions, causing the driver to lose control.
Police are continuing their investigation into the accident.