New Covid-19 restrictions came into force in Thailand on Monday to try to halt a spiralling outbreak that saw deaths hit a record single-day high over the weekend.
In Bangkok -- where the latest outbreak has been traced back to a nightlife district -- as well as 47 other provinces, wearing masks is now compulsory in public spaces, with some locations backing it up with the threat of a 20,000 baht ($640) fine.
Authorities in the capital have also closed a raft of venues including cinemas, parks, gyms, swimming pools, spas and nurseries.
The new restrictions come a week after authorities ordered bars and nightclubs to close and banned restaurants from serving alcohol.
The tightening comes as total infections reached 57,500 on Monday, up from just 29,000 in early April.
Some 2,048 new cases were announced on Monday. The day before, Thailand recorded its highest single-day death toll of the pandemic, with 11 fatalities.
Until the latest outbreak, Thailand had managed to keep infections down, thanks to strict travel restrictions and swift action to isolate confirmed cases.
But there have been complaints about the slow rollout of vaccines, with Thailand lagging behind other countries in the region.
Prime Minister Prayut Chan-O-Cha said on Facebook the government was trying to source more doses and ramp up the programme to inoculate 300,000 people a day.
In neighbouring Cambodia, also in the grip of a new coronavirus wave, the World Health Organization (WHO) urged factory owners in the key garment sector to help protect workers.
"The current outbreaks in factories and markets serve as a painful reminder of the importance of investing in mitigation measures before cases occur, to help prevent the virus spreading," Li Ailan, WHO representative in Cambodia, said in a statement.
Li urged factory owners to do more temperature screening and rearrange workshops to allow social distancing.
The capital Phnom Penh has been under lockdown for 12 days now and last week the authorities ordered all wet markets in the city to close for 14 days.
Prime Minister Hun Sen on Sunday ordered tougher enforcement of lockdown measures.
Cambodia has reported 9,975 cases in total and 74 deaths including 10 on Saturday -- a single-day record for the country.
Neighbouring Laos -- which appeared to escape the brunt of the pandemic last year -- is also undergoing a surge, jumping from 58 cases to 323 in less than a week.
Its capital Vientiane was placed under a snap lockdown last week, with authorities prohibiting residents from leaving their homes except for groceries and going to the hospital.