"Poland will take consistent action for European unity, without divisions into those better and those worse and without any regulation of the voting rights", Duda said.
'Who knows where it leads?'
Speaking to Fox News, he said: "The era of strategic patience is over".
A joint press release issued after the dialogue said the North had agreed to send a delegation to the 2018 Winter Olympics to kick off in February in South Korea's Pyeongchang, and the 2018 Paralympics in March. Warsaw is also working to win allies in the spat.
"On December 28, there were also a large number of personnel (~100 to 120) observed in seven different formations whose purpose is unknown in the Southern Support Area", it adds. Trump has dubbed the North Korean leader "Rocket Man", and called him a "maniac", a "madman", a "bad dude", and a "sick puppy". The two sides also agreed to hold military talks in an attempt to prevent an accidental conflict on the peninsula.
News of a tunnel reportedly crumbling at the nuclear site in October - likely because of the country's sixth and most powerful nuclear test in September, which potentially killed 200 people - sparked a lot of speculation about the site's future.
President Donald Trump on Saturday expressed hope for some progress from the talks and said he was open to talking with Kim himself. "We are always open to talks".
Trump has in the past called Kim "short and fat" and "a bad dude". "I think a certain level of success must be guaranteed", Moon said.
The officers question Trump's temperament, judgement and indifference to expert advice.
Last year, there were several missile launches by North Korea generating a security dilemma in its neighboring countries, and it was mainly felt by South Koreans.
He welcomed the agreement on continued military-to-military talks and the reopened inter-Korean military hotline, saying these are important channels "to avoid misunderstanding and to reduce tensions".