Four Thai nationals returned from abroad are the latest COVID-19 patients in Thailand, bringing the tally to 3,162 cases with 58 fatalities.

Centre for COVID-19 Situation Administration (CCSA) spokesman Thaweesilp Wissanuyothin said the four new patients, aged between 22 and 53, returned from Sudan (two) and the United Arab Emirates (two).

"Today also marks 32 days without local transmission in the kingdom.

"However, we cannot let our guard down. We should continue to observe social distancing and practice good hygiene to avoid a second wave of COVID-19 outbreak," he said at the COVID-19 daily briefing here today.

Since April 3, of the 46, 569 Thais who returned from abroad and underwent the 14-day quarantine at state facilities, 225 or 0.48 per cent of them were tested positive for COVID-19.

-- BERNAMA