Bangkokians are ordered to put on masks from Monday or be fined.

Bangkok Governor Aswin Kwanmuang announced the new rule on Sunday.

Violators risk a fine of up to 20,000 baht.

The penalty would also apply to all establishments that fail to enforce mask-wearing for those on their premises.

The move comes as the capital faces a high infection rate in the third wave of the coronavirus.

Bangkok has found 8,175 cases since the latest outbreak began early this month, more than twice that of second-placed Chiang Mai, which has logged 3,148.

The capital has seen the number of new infections jump from fewer than 300 on Monday to more than 1,000 per day over the weekend.

It has joined 45 other provinces where mask-wearing outside the home to guard against the spread of Covid-19 is now compulsory. They are:

NORTH

•     Chiang Rai
•     Phetchabun
•     Sukhothai
•     Tak
•     Uttaradit

NORTHEAST

•     Amnat Charoen
•     Buri Ram
•     Chaiyaphum
•     Khon Kaen
•     Loei
•     Maha Sarakham
•     Mukdahan
•     Nakhon Phanom
•     Nong Khai
•     Si Sa Ket
•     Surin
•     Ubon Ratchathani
•     Udon Thani
•     Yasothon

CENTRAL AND EAST

•     Ayutthaya
•     Bangkok
•     Chanthaburi
•     Chon Buri
•     Kanchanaburi
•     Lop Buri
•     Nakhon Pathom
•     Nonthaburi
•     Phetchaburi
•     Prachin Buri
•     Prachuap Khiri Khan
•     Samut Krakan
•     Samut Sakhon
•     Saraburi
•     Suphan Buri
•     Trat

SOUTH

•     Narathiwat
•     Nakhon Si Thammarat
•     Pattani
•     Phangnga
•     Phuket
•     Ranong
•     Satun
•     Songkhla
•     Surat Thani
•     Trang
•     Yala