North Korea says new missile carries 'super-large warhead,' but experts skeptical of claims

North Korea said Tuesday it had test-fired a new tactical ballistic missile capable of carrying "a super-large warhead," a claim quickly disputed by South Korean officials and experts who speculate the North likely fabricated a successful test to conceal a botched launch.

It’s the second time that South Korea has questioned North Korea’s claim on the development of new weapons in recent days, as the rivals are locked in heightened animosities over the North’s testing activities.

The...