By The Nation
Police said the accident happened at 5.40am on the Chaiyaphum-Si Khiew road in Chaiyaphum's Chaturas district.
The driver, Samart Jaichoom, 57, and 14 passengers were rushed to the district hospital. Police said they have yet to question the driver to determine the cause of the accident.
A passenger, Thirapat Klubjai, 17, who was not injured, said the bus was transporting 30 passengers from Bangkok to Nong Bua Lamphu.
Thirapat said he woke up as dawn was breaking and felt the bus swaying from left to right, causing the other passengers to scream before it flipped.