This is written by the news agency Reuters.

In addition, it was agreed to increase the weight of warheads from 500 kilograms to one ton. The leaders of the countries agreed to continue pressure on Pyongyang by all available diplomatic means.

Note that such fears from Seoul and the US are caused by the next launch of ballistic missiles. Earlier, the DPRK confirmed the information on the successful testing of the hydrogen bomb.

The tests were carried out underground, and therefore caused on the peninsula a small earthquake in the amplitude of five points.

As reported in "URA-Inform", the President of the United States of America Donald Trump and German Chancellor Angela Merkel on Monday held telephone talks on tightening sanctions against the DPRK.