Three schools in two border provinces, Prachuap Khiri Khan and Kanchanaburi, have been temporarily closed over fears of the Covid-19 outbreak spreading from Myanmar.

In Kanchanaburi, students came in close contact with illegal border crossers from Myanmar who later fell sick and were hospitalised.

In Prachuap Khiri Khan, students' parents were reported to have crossed back and forth over the border through natural passage ways in Hua Hin district.

Anan School in tambon Huay Satyai and Ban Huay Khrai School in tambon Bueng Nakhon of Hua Hin  issued letters to students' parents announcing classes had been suspended from Sept 1-7.

Anan School had 576 students, of whom about 300 were from Karen and Myanmar ethnic families. Recently, a student had a fever and did not go to school. An investigation found that four members of the student's family crossed the border to Myanmar and returned to Thailand on Aug 26.

Ban Huaykhrai School has 310 students, including 45 from ethnic families. No students have been sick.

In Kanchanburi, a school in Thong Pha Phum district has been temporarily closed after three students were found to have been in close contact with three men who illegally crossed the border from adjoining Myanmar and stayed in their house, health officials said.

The principle then closed Ban Kui Yae School for three days, Sept 1-3, pending the result of the Covid-19 tests on the three Myanmar men.

More than 580 Covid-19 cases have been confirmed in Myanmar since Aug 16.