That complex, located near residential and commercial buildings, likely experienced a large explosion but The Diplomat said it was impossible to determine whether there were casualties.
The unnamed source pointed out where the rocket had landed and Google Earth images taken on May 18 a year ago, just weeks after the launch, appear to show damage to a greenhouse-style structure at the same spot.
A ballistic missile launched by North Korea previous year failed in flight and crashed back to the ground, it has been reported. This photo shows a test launch of the ground-to-ground medium long-range strategic ballistic rocket Hwasong-12 at an undisclosed location, May 14, 2017.
Because of the secretive nature of functioning in North Korea, many say it is not possible to completely authenticate the report but that there is evidence to show that the IRBM caused destruction in a civilian area. The Hwasong-12 is a liquid fuel missile which uses combination of hypergolic propellant and oxidizer. Flight failure over the sea would have had a lower chance of striking human infrastructure. However, according to reports, North Korea discarded Sinpo as a ballistic testing site after April for some reason.
North Korea likely to demand a price for Olympic participation
This shows that Kim does not intend to abandon the development of nuclear weapons and intercontinental ballistic missiles (ICBMs). In his address, he also called for warming relations with South Korea.
Two Unha-3 missiles have been successfully launched, the latest in February 2016 from the Sohae Satellite Launching Station in the northwest of the communist country. It is believed that the success of the missile paved way for Hwasong-14/KN20 intercontinental-range ballistic missile (ICBM), unveiled by North Korea past year.
With those changes, the USA would only have a few hours to detect pre-launch preparations in the event that North Korea prepares to strike.
Past altercations have also involved Trump calling the North Korea's Supreme Leader as the "little rocket man", whereas, Kim Jong-un called the US President a "dotard" as a sign of insult.
Dr Baker, an adviser to Reagan during the Cold War, claimed North Korea is taking "considerable" risks, which could see a missile veering off course and hitting the wrong target. He insisted that high-level negotiators from both Koreas meet at Panmunjom, situated at the border, next Tuesday to discuss the North's Olympic participation.