The curfew is being cut in phases after it was initially imposed on April 3 for the period between 10pm and 4am.
However, the country would remain closed to foreigner visitors due to concern over the spread of Covid-19 from abroad, said Somsak.
Inter-provincial travel will be allowed to restart on June 3 for those who had necessary journeys to make, he added.
Department stores could also open until 9pm.
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