the wounded. motorcycles were scorched and relegated to clumps of twisted metal. one bystander was shaken by what he had witnessed. >> reporter: the damage appeared to be the result of a single pipe bomb wrapped in cloth and placed at the base of the historic shrine, a landmark popular with tourists and buddhist thai worshippers. a military junta is urging calm and vowing to hunt down those responsible for an attack officials say was clearly intended to damage the kingdom's lucrative tourism industry. since last year's military coup, bangkok has been relatively calm, although there has been political tension. the military junta says elections are not going to be held until at least 2017. charlie?