Of the four people killed in Hat Yai, two were foreign tourists – a Canadian man and a female Chinese national.
The wounded has since doubled to 62, including 11 foreigners. At least 7 are Malaysians. They are Chong Ka Chin, Sioh Soo Wai, Tonu Kung Boo San, Chua Mon Khiang, Lok Moon Long, Loke Oui Lan and Rama Chandran.
Police say the bombs exploded almost simultaneously in an area crowded with bars and cafes, as well as at department stores.