Thai Prime Minister Thaksin Shinawatra says authorities were aware of the possibility of attacks by militants Thursday in southern Thailand, but failed to prevent the series of bombings.
Officials say at least two people were killed when about 40 bombs exploded within minutes of each other in the provinces of Yala, Pattani and Narathiwat, targeting local government offices and police stations.
Mr. Shinawatra says prevention methods were not good enough to stop the attacks.
More than 13,00 people have been killed in two years of unrest along Thailand's southern border with Malaysia.
Thailand's government blames the unrest on Islamic militant separatists, organized criminals and corrupt local officials.