Two tuk-tuk drivers early on Sunday surrendered after a Patong entertainment worker was shot and killed.
Patong police were notified of the incident, which occurred at 4am at Soi Patong Tower, off Taweewong Road in Phuket.
Police and emergency responders arrived to find the body of a man, who was identified as 45-year-old Panya Kingjampa, who was a staff member at an entertainment venue.
Blood was found on the ground where his body was lying.
His body was taken to Patong Hospital, where doctors found bullets lodged in his stomach.
On Sunday evening, two suspects surrendered to officers at Patong police station, where they handed in a handgun.
They are facing charges of assault resulting in death.
The suspects reportedly told police that they had attempted to stop Panya from trying to steal belongings from a tourist.