South Korea says, North Korea has fired a missile today, but the launch have been unsuccessful. South Korea's defense ministry said the launch came from the eastern coastal town of Wonsan. <br/><br/>The US military also confirmed that it detected a failed North Korean missile launch which exploded within seconds. The latest tests are seen as a response to the ongoing annual US-South Korea military drills that the North sees as preparation for an attack on it. <br/><br/>North Korea is banned from any missile or nuclear tests by the United Nations. However, it has conducted missile tests with increasing frequency and experts say this could lead to advances in its missile technology. Earlier this month, the North fired four missiles that flew about 1,000km landing in Japanese waters.