The number of Chinese nationals killed in Monday night's explosion in Bangkok rose to six on Tuesday, four from the mainland and two from the Hong Kong Special Administrative Region, according to the Chinese embassy in Thailand.

The bombing had left 20 dead and 125 injured as of Tuesday noon, Thai PBS reported. The dead included two Malaysians, and one from Singapore, Indonesia and the UK.

Another 22 Chinese - 17 from the Chinese mainland, two from Hong Kong and three from Taiwan - were hospitalized, the embassy said. More than 10 others, who sustained minor injuries, have been discharged from the hospital, and one person remained missing.