North Korea releases new propaganda video titled 'Last Chance'

North Korea has released a new propaganda video on Saturday titled 'Last Chance', showing a submarine-launched nuclear missile destroying Washington and concluding with the US flag in flames.

The four-minute video romps through the history of US-Korean relations and ends with a digitally manipulated sequence showing a missile surging through clouds, swerving back to the earth and slamming into the road in front of Washington's Lincoln Memorial, reports Guardian.

South Korea and American allies face 'miserable end', says North Korea.

The US Capitol building explodes in the impact and a message flashes up on the screen in Korean: "If US imperialists budge an inch toward us, we will immediately hit them with nuclear (weapons)."

Pyongyang has upped the rhetorical ante in recent weeks, with near daily threats of nuclear and conventional strikes against the South and the US mainland in response to large-scale South-US war games.

The threats have turned increasingly personal and North Korea leader Kim Jong-Un on Friday watched a live-fire long-range artillery drill simulating a strike on the official residence of his South Korean counterpart.

Tensions between both sides have been on the rise since Pyongyang carried out its fourth nuclear test in January and a satellite rocket launch a month later that was widely seen as a disguised ballistic missile test.

North Korea has been pushing to acquire submarine-launched ballistic missile (SLBM) capability which would take its nuclear strike threat to a new level, allowing deployment far beyond the Korean peninsula and the potential to retaliate in the event of a nuclear attack.