Lao immigration officers have asked their Thai counterparts to inform Laotians in Thailand that border crossings in both countries remain closed.
Thai public health officials have travelled to Nong Khai to screen the stranded workers for Covid-19 as part of measures to curb the contagion.
The number of Lao immigrant workers arriving at the border has been increasing since May 3. The immigrants are seeking to return to their homeland after being laid off by Thai employers hit by the economic freeze during the lockdown period.