He said the ministry is coordinating with immigration officials to provide travel history, personal information and pictures to the Department of Disease Control so the public can be alerted to such a group of workers.

Meanwhile, Nakhon Ratchasima Governor Wichian Chantarothai and Suranaree Camp Hospital director Major Surasak Thanadsidhama will check two quarantine areas for labourers returning from South Korea and capable of accommodating 180 people.