Anuban Mae Sai School will shut its doors from December 1-6 after local residents voiced concern over a potential Covid-19 outbreak.
The announcement was made on Monday after a group of Thai women were caught illegally sneaking back across the border, triggering heightened health and security monitoring.
Chiang Rai immigration police on Sunday arrested three women and a transexual after one of them boasted online of their illegal return from Myanmar.