North Korea warns of miltary action if South continues with loudspeaker propoganda broadcasts

North Korea has warned of military action if South Korea continues to broadcast anti-Pyongyang material using a loud speaker along their shared border.

South Korea's defence ministry said it had received a letter from North Korea ordering them to halt the broadcasts within 48 hours, calling them a "major challenge".

It comes after North Korea opened fire at its neighbours today, targeting the speaker.

South Korea said it had retaliated by firing artillery rounds towards North Korea.

In 2004, North and South Korea agreed to stop blaring propaganda at one another across the border, but such broadcasts have resumed in recent days as relations between the two countries deteriorate.

Read more: North Korea fires shots at South's propaganda loudspeaker