Kim Jong un
North Korea has reportedly flown drones over South Korea despite warnings. Pictured: Kim Jong-UnReuters

North Korea released a propaganda video called "Last Chance" Friday, threatening the U.S. of a submarine nuclear attack. The video, which is peppered with upbeat music, shows a burning American flag at the beginning and the end.

The Asian country recently increased its attempt to intimidate the U.S. and South Korea. North Korea said it has successfully tested solid fuel missiles, which expedite the launch process of a rocket. South Korea, in response, said the northern country was developing solid fuelled missiles. The isolated country also tested multiple nuclear and ballistic missiles recently despite the United Nations' sanctions against it.

The four-minute video shows the history of relations between North Korea and the U.S. since 1950. It also displays the Asian country's military power by featuring naval ships and aircraft. The digitally-manipulated reel shows the Lincoln Memorial in Washington being blown up by a nuclear missile at the end.

"If US imperialists budge an inch toward us, we will immediately hit them with nuclear (weapons)," a message flashes in Korean on the screen after the impact, according to AFP. The video was released Friday on North Korea's website DPRK Today.

The U.N. levied stricter sanctions against North Korea after it test fired nuclear and ballistic missiles. South Korea suspended operations in the only industrial zone where the two jointly operated after the tests. The southern country has also put its military on ready status to counter North Korea's attacks after it threatened to burn to ashes the Blue House Thursday.