A video released by the North Korean website DPRK Today depicted a nuclear attack on Washington as an angry Pyongyang retaliated against joint military drills between South Korea and the Unites States.
The four-minute video, titled "Last Chance," showed a digitally created scene of a missile fired from a North Korean submarine into the streets of Washington wiping out the city, the AP news agency reported.
Pyongyang, which believes the drills are a dress rehearsal for an invasion was further angered when South Korean media reported the exercises included a simulated training for a "decapitation strike" targeting North Korea's top leaders.
Later on Saturday, Kim Jong-un warned that his military was well prepared to attack Seoul's presidential palace unless the South Korean President Park Geun-hye apologised for "treason" and publicly executed officials responsible for what Pyongyang says are plans to attack its leadership.
North Korea is believed to have artillery capable of striking Seoul to cause severe damage and casualties.
However, such a strike is unlikely as the North Korean leader has never followed through on any of his threats.
TV screen showing a file footage of the missile launch conducted by North Korea [Lee Jin-man/Associated Press]
A video much like "Last Chance" was aired in 2013 after North Korea conducted its nuclear test and satellite launch.
The video received a great deal of attention but it is believed that Pyongyang has not yet perfected its military technology to be a credible threat to US cities.