"Most of the incidents were caused by ill-intentioned people and those who wanted to create unrest in Bangkok," he said.

    Surayud added that investigators have received information as well as photographs from eyewitnesses at Sunday's scenes.

    Meanwhile, Defense Minister Gen. Boonrawd Somtas said on Thursday that "men in uniform" were behind the New Year's Eve bombs in Bangkok which killed three and injured some 40, including nine foreigners.

    The minister said it was "highly likely that the perpetrators are men in uniform."

    "It's 90 percent sure that it is politically motivated and only a handful of groups of people have the potential to mount these attacks," he said.

    He said it was unlikely that civilians would have the training to coordinate the eight small blasts across a wide urban area, and said that left "only either police or military."