Last updated at 12.01pm with Kim's remarks praising Russia.

Russian President Vladimir Putin and North Korean leader Kim Jong Un held talks with their delegations before holding one-on-one negotiations on Wednesday, the TASS news agency reported. The leaders then proceeded to an official dinner in Kim's honour, it said. 

Kim Jong Un praised Moscow's army fighting in Ukraine during the dinner.

"I am deeply convinced that the heroic Russian army and nation will greatly inherit the tradition of victory and demonstrate priceless virtues and honour on the fronts of the special military operation (in Ukraine)," Kim told Putin in Russia's Vostochny cosmodrome, according to Russian news agencies.

He said he was confident Moscow would win a "great victory" over its enemies.

"We are confident that the Russian army and people will certainly win a great victory in the holy struggle to punish the gathering of evil."  

President Putin earlier warmly shook hands with a beaming Kim as he welcomed him, kicking off a meeting that was expected to see the internationally isolated leaders forge an arms deal.

Accompanied by an entourage that suggested a strong military focus for the summit, the North Korean leader travelled overland to Russia in his bullet-proof train, the official Korean Central News Agency reported.

While Kim was out of the country, North Korea fired two ballistic missiles on Wednesday, the South Korean military said, the latest in a string of sanctions-busting tests.

Kim thanked Putin for inviting him to visit, despite the Russian leader's "busy schedule", having earlier stressed the trip -- his first post-pandemic foreign travel -- showed North Korea was "prioritising the strategic importance" of its Russia ties.

The pair met at the Vostochny Cosmodrome, a Russian spaceport some 1,000 kilometres (620 miles) from Vladivostok, with Putin saying the location was chosen as Moscow plans to help North Korea with its satellite programmes, RIA Novosti reported. 

"The leader of the DPRK shows great interest in rocket technology, and they are trying to develop (their presence in) space," Putin said, referring to North Korea by its official name.

"We'll talk about all the issues, without haste. There is time," he said, when asked by reporters before the meeting whether military cooperation would be on the agenda.

Russian Defence Minister Sergei Shoigu -- who visited Pyongyang in July and has recently mooted bilateral joint naval drills -- took take part in the negotiations, Putin's press secretary Dmitry Peskov said.

Kim was accompanied by top military officials including Korean People's Army Marshal Pak Jong Chon and Munitions Industry Department Director Jo Chun Ryong, KCNA has said.

- Spaceport 'optimal location' -

The meeting at the cosmodrome was symbolic and sends a signal that Russia might help North Korea with its rocketry and satellite programmes, experts said.

Pyongyang failed twice recently in its bid to put a military spy satellite into orbit. 

"The spaceport seems to be the optimal location because it responds to mutual interests, such as providing satellite technology requested by North Korea," An Chan-il, a defector-turned-researcher who runs the World Institute for North Korea Studies, told AFP. 

Russia is eager for North Korea's stockpile of artillery shells likely for use in Ukraine, while Pyongyang is looking for help in upgrading its Soviet-era equipment especially for its air force and navy, he said.

"If North Korea's multiple rocket launchers and other artillery shells are provided to Russia in large quantities, it could have a significant impact on the war in Ukraine," he added.

Russia's natural resources minister Alexander Kozlov greeted Kim when he arrived in the country, giving him historic autographed photographs of Soviet cosmonauts, including Yuri Gagarin, Kozlov's ministry told TASS.

Russia and North Korea's communication is back on a pre-Covid track with dialogue "actively developing", foreign ministry spokeswoman Maria Zakharova told TASS. 

"Our contacts are developing literally on a daily basis in a number of areas."

The White House warned last week that North Korea would "pay a price" if it supplies Russia with weaponry for the conflict in Ukraine.

Kim is also risking the displeasure of his other major ally Beijing by meeting Putin, Vladimir Tikhonov, professor of Korean studies at the University of Oslo, told AFP.

"China will be hardly too happy about Russia entering into what Chinese consider their monopoly territory," he said, adding Beijing would be worried about the regional destablisation impact of any transfer of Russian military technology to Pyongyang.

Kim and Putin "may conduct an exchange of North Korea's old-age, Soviet-type ammo for Russia's newer military tech or hard currency (or wheat).

"Tactically, they both gain, by getting what they need right now. In a longer term though, Russia's important ties to Seoul will be dealt irreparable damage."