The group was screened for Covid-19 before being expelled via the border checkpoint in Chiang Rai’s Mae Sai district.
Separately, the Immigration Bureau on Thursday reported results of a roundup of undocumented immigrants in Bangkok and Samut Sakhon province, the epicentre of the latest Covid-19 outbreak.
The bureau said 300 immigration officials working alongside Labour Ministry and Public Health Ministry personnel found 61 unregistered migrant workers in Samut Sakhon province on Tuesday. Fifty-four were from Myanmar, four from Cambodia and the remaining three from Laos. Most of them had crossed the border illegally, said the bureau.
All were tested for Covid-19 but none was found to be infected.
The non-profit Mekong Migration Network has urged Thai authorities not to scapegoat undocumented migrant workers for the latest outbreak of Covid-19 in Thailand. Myanmar migrant workers in Samut Sakhon are thought to be the source of the outbreak. PM Prayut Chan-o-cha has ordered an investigation of human-trafficking gangs who reportedly bribe Thai immigration and border officials to bring migrant workers into the country.