Thai Prime Minister Prayuth Chan-ocha speaks to reporters at the Government House in Bangkok Aug. 18, 2015. Prayuth Chan-ocha on Tuesday promised the authorities would quickly track down those responsible for the central Bangkok bombing, which he described as the country's worst attack ever. Photo: Xinhua
Thai Prime Minister Prayuth Chan-ocha speaks to reporters at the Government House in Bangkok Aug. 18, 2015. Prayuth Chan-ocha on Tuesday promised the authorities would quickly track down those responsible for the central Bangkok bombing, which he described as the country's worst attack ever. Photo: Xinhua
Thai Prime Minister Prayuth Chan-ocha speaks to reporters at the Government House in Bangkok Aug. 18, 2015. Prayuth Chan-ocha on Tuesday promised the authorities would quickly track down those responsible for the central Bangkok bombing, which he described as the country's worst attack ever. Photo: Xinhua