US officials and media have said they believe Kim will make a rare trip abroad to neighbouring Russia to meet Putin.

"No, we cannot" confirm this, Kremlin spokesman Dmitry Peskov said, when he was asked if Kim would meet Putin soon. "We have nothing to say on this."

Washington has accused Pyongyang with supplying weapons to Moscow for its Ukraine offensive.

Russia is one of a handful of countries that has friendly relations with the secretive state.

As its Ukraine offensive drags on, it has in recent months worked for even closer ties with Pyongyang.

Defence Minister Sergei Shoigu, who in July visited North Korea, on Monday said Moscow was considering joint military drills with North Korea.

"Why not? They are our neighbours," Shoigu was quoted as saying by the TASS news agency, when asked about the possible exercises.

Shoigu became Kim's first known foreign guest since the Covid-19 pandemic when he visited Pyongyang on July 27.

He was shown Pyongyang's nuclear missiles in a personal tour by the North Korean leader.

Russia shares a short border with North Korea on its Pacific coast.

If Kim does visit, he is expected to cross the border by armoured train, as he did in 2019 when he met Putin in the fareastern Russian city of Vladivostok.