The explosion and subsequent fire panicked and confused residents of the coastal city of Gangneung, who were already uneasy over the increasingly provocative weapons tests by rival North Korea.Their concern that it could be a North Korean attack only grew as the military and government officials provided no explanation about the explosion for hours."At the moment we haven't been able to verify the original footage and US State Department spokesperson has also got no new information yet on the cause or the veracity of the explosion," he said.South Korea's Joint Chiefs of Staff said no injuries have been reported from the explosion, which involved a short-range Hyumoo-2 missile that crashed inside an air force base in the outskirts of the city.Kwon Seong-dong, a ruling party lawmaker representing Gangneung, wrote on Facebook that a "weapons system operated by our blood-like taxpayer money ended up threatening our own people" and called for the military to thoroughly investigate the missile failure."