Kim Jong Un Special Aircraft Took Off, South Korea Worried About Another Invasion From North Korean

North Korean President Kim Jong-un is believed to have flown from Pyongyang to the eastern part of the country on Wednesday, raising concerns that Kim may be returning for a second giving notice of North Korea's military move.

News agency  Yonhap  quoted data of aviation  Aircraft Spot  said the twin-engine aircraft An-148 was detected flying towards the northeast at about 10am today, 17/6.

After that, the signal of the plane disappeared near North Hamkyong province.

North Korean observers say the Air Koryo plane has been used as Kim's jet in the past.

The path of the An-148. Photo: Flightradar24

"An-148 is suitable for short flights," a source told  Yonhap . Meanwhile, the IL-62 - another of Kim's special aircraft - is often used for long flights.

"However, to be honest, it's hard to conclude who was on the plane." 

the source said.

The unusual move came after North Korea warned of military action against South Korea to protest the defector's release of anti-Pyongyang leaflets across the border.

While Kim Yo-jong - Kim Jong-un's younger sister - often makes tough statements, Mr. Kim hasn't appeared for more than a week.

According to the flight direction, some people believe that the destination of the An-148 may be Sinpo, on the East Coast, a new North Korean submarine factory.

Submarine (near completion) is said to be 3,000 tons class, can carry 3 submarine ballistic missiles (SLBM).