Progressive Movement co-founder Thanathorn Juangroongruangkit posted on his Facebook page on Monday that he and members of his campaign team who had visited Samut Sakhon province during the week before election on Sunday had been tested for Covid-19 immediately after news of mass infection was found in the province.

Two people were killed in a fiery explosion at the GRD Energy oil refinery in Samut Sakhon during a test run.