Democratic People's Republic of Korea (DPRK) leader Kim Jong Un has arrived in the Russian border city of Khasan for the first meeting with President Vladimir Putin in the Pacific coast city of Vladivostok, Yonhap reported, citing Russian media.

This picture released from the Korean Central News Agency (KCNA) of The Democratic People's Republic of Korea on April 24, 2019 shows DPRK leader Kim Jong Un (C) waving to well-wishers at an undisclosed location in North Korea before travelling to Russia on a train. [Photo: AFP/KCNA VIA KNS]

Kim left "by a private train at dawn on Wednesday to visit the Russian Federation," the DPRK's state media KCNA reported.

It will be his first talks with the Russian president.

Kim and Vladimir Putin will meet in the Russian Far Eastern city of Vladivostok on Thursday, the Kremlin said.

"The focus will be on a political and diplomatic solution to the nuclear problem on the Korean Peninsula," Kremlin foreign policy aide Yuri Ushakov told a briefing on Tuesday.

He said the situation on the Korean Peninsula had "stabilized somewhat" in recent months.

"Russia intends to help in any way possible to cement that positive trend," he said.

Ushakov said the talks would begin one-on-one and then move into an "expanded format," without providing further details.

He said no joint statement or signing of agreements was planned.