He said the company's 500 workers may lose their jobs.
"We risk both life and property from the ongoing violence"
"We will discuss what to do next but I think we may have to shut down the company because there is no safety here," Kiert told reporters.
"We risk both life and property from the ongoing violence."
The fire follows Sunday's string of bombings and other attacks across the four Muslim-majority provinces of southern Thailand.
The bombings – 29 of which went off within 45 minutes - left at least eight people dead and dozens injured.
The army said the three men arrested after the attacks have admitted their involvement.
About 2,000 people have been killed in Thailand's south since the current wave of violence flared in January 2004.
Lt. Gen. Viroj Buajaroon, the army's regional commander for the south, said it was unclear which group was responsible for Sunday's attacks, but the three suspects had given information about others involved.
He said some were trained by a group known as Runda Kumpulan Kecil, but gave no more details.
The group is believed by some terrorism experts to refer more to an informal network of separatists who allegedly received training in Indonesia.
Violence in Thailand's south has been escalating in recent months despite a major policy shift by the military-installed government, which is trying to replace the hardline approach of the previous administration with a campaign to win over local residents.