Koh Samui will ban people entering the resort island from Tuesday until the end of the month, as it joins the nationwide campaign to bring down the number of new coronavirus infections.

The Koh Samui mayor on Monday announced the three-week entry ban, effective from April 7-30.

People will not be allowed to visit the island, except those with a health certificate from a public hospital issued within the previous 72 hours and confirming that they are not infected with the virus.

Those working in transport in essential sectors - such as energy, finance, consumer products, postal services and public health - will be allowed to enter the island, the announcement said.

Violators will be liable to a fine of up to 20,000 baht.

Sea transport will be the only access to the island from Tuesday. Bangkok Airways said on its website that the airport, which it owns, will be closed from Tuesday until the end of the month.

Surat Thani province has 17 confirmed Covid-19 cases, six of them on Koh Samui. 

The island received 1,291 arrivals on Saturday, a slight drop from 1,369 on Friday, according to latest figures posted on the Koh Samui Municipality Facebook account.