The North Korean leader departed Vladivostok on Friday. It is unclear why.
Putin said after holding his first face-to-face talks with North Korean leader Kim Jong Un on Thursday that US security guarantees would probably not be enough to persuade Pyongyang to shut its nuclear program.
He also told Putin the situation on the Korean Peninsula has reached a "critical point" and whether tensions resume will "entirely depend on the US future attitude".
Kim criticized Washington for taking a "unilateral attitude in bad faith" at his February meeting with President Donald Trump in Hanoi said that has caused the diplomatic standstill, North Korea's state-run Korean Central News Agency said Friday.
It comes a week after Pyongyang accused the USA of derailing peace talks.
A German auto manufacturer that makes armoured limousines used by Kim Jong-un says it has no business dealings with North Korea.
"And (he) added that peace and security on the Korean peninsula will entirely depend on the US future attitude, and the DPRK will gird itself for every possible situation", it said, using the initialism of the North's official name, the Democratic People's Republic of Korea.
At their meeting, Mr Kim told Mr Putin peace and security on the Korean peninsula depended on the U.S., warning a state of hostility could easily return, North Korean media said. The Russian leader also said Kim would be willing to disarm, providing there were security guarantees.
"We need to. return to a state where global law, not the law of the strongest, determines the situation in the world", Mr Putin said. Just like two days earlier, traffic was completely blocked in all of the city centre during the sendoff ceremony for Kim. The US is plainly putting pressure on South Korea, demanding that inter-Korean ties do not outpace Washington's relations with North Korea, the organ, which handles Pyongyang's daily affairs on Seoul, said.
What do we know about the summit?
The two leaders greeted each other warmly, shaking hands and sharing smiles, at the start of meetings on an island off Vladivostok that lasted almost five hours.
Putin has attempted to place himself at the forefront of the campaign to enrich the Kim regime by lifting sanctions in the aftermath of his meeting with Kim.
"China is helping us because I think they want to".
"There are no other efficient global mechanisms at the moment", Mr Peskov told reporters on Wednesday. Chosun Ilbo, a conservative South Korean newspaper, reported that rumors of the executions suggested that Kim made other senior officials watch the killings as a warning. There were no concrete announcements or agreements in Vladivostok, but analysts said Thursday's meeting was valuable to both sides.
FILE - The Arch of Reunification, a monument to symbolize the hope for eventual reunification of the two Koreas, is seen in Pyongyang, North Korea, Sept, 11, 2018.
"This may not mean an immediate shift in their USA strategy, but the diplomats will likely take the initiative to contain the fallout from Hanoi and promote diplomacy with various countries".
Earlier this month North Korea demanded that Mr Pompeo be removed from nuclear talks, accusing him of "talking nonsense" and asking for someone "more careful" to replace him.
Russian Federation has also called for the sanctions to be eased, while the United States has accused Moscow of trying to help Pyongyang evade some of the measures.
"Instead, the meeting abruptly ended when President Trump walked out, telling reporters that Kim and his negotiators were too intransigent". Yet amid the two Trump-Kim summits, the Kremlin had been somewhat sidelined.
North Korea is making headlines again this week, but not because of Kim Jong Un's interactions with U.S. President Donald Trump.
The talks between North Korea and Russian Federation crystalized elements of Russia's Korea policy.
While negotiations between the US and North Korea have stalled, as have those between North and South Korea, Russo-North Korean relations may be ratcheting up.
Trump indicated that he does not see China and Russian Federation as rivals in the struggle to influence North Korea and that they are all on the same page.
Under President Putin, Russia recovered economically and in 2014 he wrote off most of North Korea's Soviet-era debt in a major goodwill gesture.
China has since cemented its role as the isolated North's most important ally, its largest trading partner and crucial fuel supplier, and analysts say Kim could be looking to balance Beijing's influence.