US President Donald Trump on Monday denied that he ordered an end to major US-South Korean military exercises as a concession to North Korea's totalitarian leader Kim Jong Un.

The previously annual, large-scale maneuvers — meant to keep troops ready in case of conflict with North Korea — were shelved shortly after Trump's summit last week with Kim in Hanoi.

Trump denied there was any link.

"The military drills, or war games as I call them, were never even discussed in my mtg w/ Kim Jong Un," he tweeted.

"I made that decision long ago because it costs the U.S. far too much money to have those 'games', especially since we are not reimbursed for the tremendous cost!" he said in the tweet.

There are close to 30,000 US troops stationed in South Korea, and their annual drills with tens of thousands of South Korean soldiers have angered North Korea, which claims they are rehearsals for invasion.

While Trump has ruled out withdrawing US troops, he has repeatedly complained about the cost of the exercises, describing them at a press conference in Hanoi as "very, very expensive."

Trump's summit with Kim ended with no progress toward Washington's goal of getting the isolated country to give up its nuclear weapons.

N. Korea's Kim arrives home after Trump summit
Seoul (AFP) March 4, 2019 –

North Korea's Kim Jong Un arrived home on Tuesday, state media said, completing his marathon journey through China after his Hanoi summit with US President Donald Trump ended without a nuclear deal.

Kim's return to Pyongyang marked the end of an epic 4,000-kilometre (2,500-mile) journey — on board his olive green armoured train — from Vietnam, where his much-hyped second summit with Trump came to an abrupt halt last week.

His talks with the US leader were followed by an official visit to Vietnam, with Kim paying tribute to the country's late revolutionary leader Ho Chi Minh.

"Kim Jong Un… arrived at home on Tuesday after successfully wrapping up his official goodwill visit to the Socialist Republic of Vietnam," according to the official KCNA news agency.

"At 3 o'clock in the early morning, his train entered the railway station yard" in Pyongyang, KCNA said, adding that senior officials "greeted him with their ardent congratulations".

A smiling Kim boarded his train at the Dong Dang border station in Vietnam on Saturday, waving to crowds at the station. His route through China was not known, nor was it clear whether he would stop to meet President Xi Jinping along the journey — although it now appears that he did not.

Earlier Saturday, Kim made a highly unusual stop at the stark concrete monument where the body of Vietnam's independence hero Ho Chi Minh is on display.

– No deal in Hanoi –

On historic North Korean anniversaries, Kim regularly pays tribute to his predecessors, his father Kim Jong Il and grandfather Kim Il Sung, at the sprawling memorial palace on the outskirts of Pyongyang where their preserved remains lie in state.

But he is not known to have previously done anything similar for a foreign leader.

Kim's trip to Vietnam was the first by a North Korean leader since 1964, when Kim Il Sung also travelled by rail for his journey to the southeast Asian nation.

Talks between Kim and Trump in Hanoi finished abruptly, with a signing ceremony scrapped after the pair failed to reach an agreement on walking back North Korea's nuclear programme in exchange for sanctions relief.

In the aftermath, each sought to blame the other's intransigence for the deadlock.

Trump insisted Pyongyang wanted all sanctions imposed on it over its banned weapons programmes lifted, and that this was a bridge too far.

But in a rare late-night press briefing, the North Korean foreign minister said Pyongyang had only wanted some of the measures eased, and that its proposal to close "all the nuclear production facilities" at its Yongbyon complex was its best and final offer.

Despite the stalemate, both sides said they were open to further talks, though a third summit has not been scheduled.