Two Hongkongers are among at least 21 killed by Monday night’s blast in the heart of Bangkok, the Immigration Department confirmed on Tuesday morning.

The department said it will deploy three officers to Thailand to visit the injured and assist their families, as well as other Hongkongers currently in the Thai capital. It advises residents already in Bangkok to remain in safe areas.

No individual or group has yet claimed responsibility for the suspected pipe bomb that detonated at around 6:30pm on Monday evening, killing at least 19 and injuring 123 outside a Hindu shrine popular with tourists.

The Hong Kong victims have been named at 19-year-old Chan Wing Yan and 24-year-old Pang Wan Chee, according to Apple Daily. Three mainland Chinese were also killed and 15 injured in the blast.

Five Taiwanese were also wounded with one Taiwanese tourist still unaccounted for, according to Taiwan’s Central News Agency.

Hong Kong residents travelling outside Hong Kong who need assistance may call the 24-hour Immigration Department assistance hotline on (852) 1868.

Ryan Ho Kilpatrick

Ryan Ho Kilpatrick is an award-winning journalist and scholar from Hong Kong who has reported on the city’s politics, protests, and policing for The Washington Post, Los Angeles Times, TIME, The Guardian, The Independent, and others