North Korea has fired an 'unknown projectile' which appeared to fail immediately after launch, South Korea's military said.

The suspected missile was fired from an airfield outside the capital Pyongyang.

The airfield has been the site of several launches, including previous tests of what were the US alleges were intercontinental ballistic missiles (ICBMs).

It comes as North Korea has in recent weeks stepped up its weapons testing.

North Korea has so far carried out nine weapons tests this year, including what the US claims were tests of parts of a new ICBM, saying they were likely to have been experimental launches before a probable full-range ICBM launch.

Source: BBC News