U.S. demands "don't suit Kim fully, they are too broad, they involve all walks of life, such as a ban on space research, chemical research and what not", Fyodorov said.
Putin, who did not elaborate on what kind of guarantees Kim wanted, said Russian Federation supported the United States call for complete denuclearization of the Korean peninsula.
"In terms of bilateral relations, we have a lot to do to develop economic relations", Putin added.
In the briefing, Kim said the two countries "have a long friendship and history" and that he hopes to develop relations to become "more firm and whole".
They held meetings at the Far Eastern Federal University campus at Russky Island off Vladivostok, Russia.
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For the Kremlin, the summit was a chance to show it remains an important actor on the global stage despite efforts by the United States and other Western states to isolate it.
While Russia extended the invitation to Kim nearly a year ago, the North Korean leader only accepted after his second summit with Trump broke down in February without agreements on relief from United Nations sanctions that are choking his economy or steps toward Kim's disarmament.
A State Department spokesman, asked about the summit, said the United States and the rest of the worldwide community "are committed to the same goal - the final, fully verified denuclearization of North Korea". But he said the security guarantees should be underwritten by multiple countries, hinting at an arrangement like the six-nation talks Russian Federation participated in until their collapse in 2009.
Until previous year, Kim hadn't left North Korea since taking power in 2011.
"The people of North Korea have always had affectionate and brotherly emotions about the people of Russian Federation and feel pride that a great country like Russian Federation is a close neighbour", Kim said after the talks.
But there is unlikely to be a major agreement reached in the talks, with Moscow committed along with the west to upholding sanctions on North Korea until it dismantles its nuclear programme.
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The two leaders are also likely to discuss the fate of around 10,000 North Korean labourers working in Russian Federation who are due to leave by the end of 2019 under sanctions.
But the USA maintains the sanctions will stay in place until North Korea makes more significant denuclearisation moves.
In an interview with CBS News, Pompeo said the Hanoi summit had more "nuance" than publicly reported, with the two sides sharing their positions.
Still, the summit could allow Mr Putin to try to increase his influence in regional politics and the standoff over North Korea's nuclear program. The meeting took place in Vladivostok, Russia.
Vladivostok, a city of more than half a million on the Sea of Japan, faced gridlock on its roads as traffic was blocked in the city centre due to Kim's visit.
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