North Korea fires two ballistic missiles, one may have fallen on land

The launches came as North Korea's ruling party held a key meeting [Jeon Heon-kyun/EPA]

North Korea has fired two ballistic missiles and the second may have failed and blown up, possibly raining debris inland, South Korea’s military said.

Monday’s launches came a day after Pyongyang promised “offensive and overwhelming” responses to new military drills staged by the United States, South Korea and Japan.