Bangkok: A spate of deadly blasts has killed two children and maimed at least five others as pro-government supporters vowed to confront their rivals in Bangkok, deepening Thailand’s three-month political crisis.

The latest blast on Sunday night in an area of central Bangkok frequented by tourists killed a 5-year-old boy, a 40-year-old woman and injured 28 others.

Witnesses took video of two bloodied and unconscious children being carried to an ambulance. They underwent emergency surgery later in hospital.

Prime Minister Yingluck Shinawatra has reportedly condemned the attacks in a Facebook posting, describing them as "terrorist acts".