North korea's leader, Kim Jong-un, has 'too much to lose' by showing hostility.

It writes the president of the UNITED states, Donald Trump, Sunday on Twitter.

'Kim Jong-un is too clever and has too much to lose, in fact everything, if he is acting in a hostile way,' writes Trump.

the Statement comes after north Korea reportedly has conducted a test at the Sohae facility. It is before been used to launch north Korean satellites.

'He signed a strong agreement on nuclear disarmament with me in Singapore,' writes Trump.

It is a reference to the Trumps meeting with Kim Jong-un in June 2018.

'He does not want to lose his special relationship to the president of the UNITED states or interfere in the us elections in november,' it sounds the further in the Trumps tweet.

It is not known what was tested at the Sohae facility on the night of Sunday, Danish time. But according to the official north Korean news agency, KCNA, it was a 'very important' test.

Missileksperter says according to the news agency Reuters, that it seems that it was a rocket engine, the north koreans tried.

If this is the case, it is "yet another strong signal that the diplomatic door is rapidly slamming in, if it hasn't already happened." It says Vipin Narang, atomekspert at the us Massachusetts Institute of Technology.

Saturday announced North korea's UN ambassador, that the country will no longer negotiate nuclear disarmament with the UNITED states.

nuclear Disarmament has been central in the american engagement with north Korea over the past two years.

In a message said the north Korean united nations ambassador, that the 'sustained and substantial dialogue,' which the UNITED states wants is a 'trick, to save time,' so it fits into a domestic political agenda.

It is apparently a reference to president Donald Trump is trying to be re-elected in 2020.

north Korea has in the past criticized the US for not wanting to make concessions in exchange for north Korea nedruster.

/ritzau/