By The Nation
The accident happened at 6.45pm on the Dan Khunthod-Nong Suang road in Dan Khunthod district.
Police said the truck driver, Suchart Muenkhunthod, 53, who was among the injured, was suspected of being under the influence of alcohol at the time.
Witnesses said his pickup was speeding and was seen swaying left and right before it hit the three vehicles in the opposite lane.
Police said Suchart's pickup first hit a car driven by Prachuap Datsanthia, 49, before it lost control and hit a pickup driven by Sakhon Namkhunthod, 43, and continued to hit a pickup driven by Aroon Prakhamsi, 55.
All the injured were taken to Dan Khunthod Hospital.