The incident happened near a bike rental shop run by the Frenchman, named by police as Gerard Pecherstorfer, 63, and his wife Suvan Paiwansao, on Sirirat Road.
Ms Suvan told police that the argument was about a bike rental agreement between them and the tourists.
“Ms Suvan told Mr Sergey that his passport had expired and asked him to provide a copy of the new one. He said he would have to go back to the hotel to get it, and asked his friend to wait at the shop. However, soon after Mr Sergey left, his friend took off as well.”
Ms Suvan related the incident to her husband when he returned from the bank, so he went off in search of the customers.
“When he found them, the three of them got into an argument, which soon escalated into a physical confrontation. Mr Pecherstorfer threatened the others with a gun, which he then took out and shot in the air twice,” said Col Peerayuth.
“Mr Sergey managed to grab hold of the gun and threw it away. Passersby intervened to stop the fight and called the police,” he added.
All three men were taken to Patong Police Station, along with the gun and other evidence.