Patong Police were alerted to the fire at about 6am.
The Patong Municipality Fire Department quickly responded and put out the fire, which started in a storage room at one of the restaurants at market.
Although there was some property damage, no injuries were reported.
Pol Lt Col Somporn Surin is now responsible for continuing to investigate the cause of the fire, Patong Police reported
Also, no suspects have been identified under suspicion of arson, and the extent of the damage has yet to be confirmed.