A Thai Airways flight attendant was robbed at knifepoint at Bangkok’s main airport on Thursday, the airline said in a statement.
Thai Airways said the victim was aboard a flight from Chiang Mai to Bangkok when the incident happened at about 9:20 a.m.
The man, who was carrying a passport, was taken to a hospital, the statement said.
Thailand is experiencing an unusually high number of violent crimes, with at least six people killed in the past month.
Police have arrested three people in connection with the case, and a fourth person is still on the run.
Thailur Sattanul, an expert on crime in Thailand, told The Associated Press that the attack in Chiangai could be connected to a recent uptick in robberies and assaults in the capital.
Sattanun told the AP that police have received tips from witnesses that they believe are related to the attack.