
Two people were slightly hurt but the blasts caused little damage on Sunday evening. They were the first to shake the capital since the military seized power to end months of sometimes deadly street protests.
"I have ordered security to be tightened because this caseinvolves the well-being of the people," Prayuth told reporters.
He also condemned the blasts, saying they affected people and destroyed properties of people. He asked the public to help by reporting to authorities if they saw some suspicious people or activities.
There was no claim of responsibility for the blasts and police have not identified any suspects but Prayuth said he wasconfident the bombers would be found through CCTV footage of thearea.
Meanwhile junta spokesman Winthai Suwari said the motive for the Sunday blasts appeared to be to create panic rather than take lives, said.
The bombs were placed behind power transformers on a walkway linking an overhead rail line to the Siam Paragon mall, police said.