An air-conditioned bus from Bangkok lost control and plunged down a hillside from a Prae road late on Friday night, injuring 19 passengers, police said.
Police said the accident happened at 10.40pm on the highway No 103 in Prae’s Song district.
The Mae Sai-Bangkok bus with 32 passenger was upside down after the plunge.
The 19 injured passengers were rushed to Song Hospital.
The bus driver, Somnuek Pummok, 52, said he had left Mae Sai heading to Bangkok and lost control of the vehicle on the road downhill.