North Korea test-fired a missile an hour ago, violating UN prohibitions. Is this a red line violation?

North Korea test-fired a ballistic missile on Saturday in local time, but the missile exploded soon after launch, U.S. officials told NBC News.

The officials said that the failed test involved a short-range, non-nuclear missile, which would be able to hit Seoul, but not Japan.

One official told NBC that the U.S. had warning of the test and watched it closely.

A South Korean military official confirmed with NBC that the test occurred around 5:30 a.m. local time. The official said the missile traveled northeast towards the East Sea. (video below)