Putin told Kim that Russia supports his efforts to normalise North Korea's relations with the United States.
North Korea has test-fired a new type of "tactical guided weapon", it has announced. Kim Jong Un observed the weapon being fired on Wednesday by the Academy of Defence Science, state-run Korean Central News Agency said. The test is North Korea’s first such test in nearly six months, but it is not clear exactly what kind of weapon has been tested.
Kim and Trump shook hands and smiled briefly in front of a row of their countries' flags at the Metropole hotel in the Vietnamese capital, Hanoi.
Donald Trump and Kim Jong-un are getting ready for their summit later this week in Vietnam.
Kim Yong Chol, North Korea's lead negotiator in talks with the United States, is travelling to Washington amid reports plans for a second summit are being finalised.
In a statement issued through the state news agency, North Korea said it will never unilaterally give up its nuclear weapons unless the United States does the same.