USA seeks 'win-win' trade relations with Indonesia: Pence

North Korea has warned its army is on "maximum alert" after the USA vice president visited the heavily militarized border between the two Koreas and reiterated Washington's position that "all options are on the table" in dealing with Pyongyang.

On Monday, Pence traveled to the tense Demilitarized Zone dividing North and South Korea, where he warned North Korea's leaders that after years of testing the USA and South Korea with its nuclear ambitions, "the era of strategic patience is over".

Korean People's Army (KPA) soldiers marching through Kim Il-Sung square during a military parade in Pyongyang marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung. "We are with you 100 per cent". The country has conducted five nuclear tests and a number of missile launches in contravention of United Nations resolutions over the past few years.

"There is a very strong belief that the United States - through cyber methods - has been successful on several occasions in interrupting these sorts of tests and making them fail", former British Foreign Secretary Malcolm Rifkind told the BBC.

He met with presidential candidates as well as South Korea's chief nuclear envoy, partly in a bid to ease tensions as a U.S. aircraft carrier group headed towards the region ahead of U.S. Vice President Mike's Pence's visit this week.

Pence said on Monday the world had seen Trump's resolve in the past two weeks, with a US missile attack on a Syrian airfield and the dropping of a powerful non-nuclear bomb on Islamic State (ISIS) fighters in Afghanistan.

North Korea will continue to test missiles despite the growing tensions between the US and its allies and Pyongyang, a senior North Korea official said Monday.

A senior North Korean official has stated that his country will continue to test missiles in spite of worldwide condemnation.

He warned Pyongyang "would do well not to test" the resolve of Mr Trump.

Speaking to Fox News television, Trump said he was dealing with Xi "with great respect" and that China had already begun enforcing more strictly its own ban on coal imports from North Korea.

The message and images sought to address questions in the Muslim world about Trump after his push for travel bans that would temporarily suspend visas from six predominantly-Muslim countries and halt the USA refugee program.

Chinese Foreign Minister Wang Yi repeated China's standard line that the crisis could only be resolved by diplomacy.

"If the U.S. is planning a military attack against us we will react with a nuclear pre-emptive strike by our own style and method", Han said.

U.S. Vice President Mike Pence and Japanese Deputy Prime Minister Taro Aso are kicking off a new U.S. -Japan economic dialogue that was launched during Prime Minister Shinzo Abe's meeting with President Donald Trump in the February.

The Trump administration wants to attract more foreign direct investment, hoping to attract some with a $1 trillion plan to rebuild USA roads, bridges and other infrastructure.

"I've seen that the United States has reiterated it is willing to use political and diplomatic means to resolve this, as this is their first choice", he told reporters in Beijing.

Victor Cha, Korea chair at the Center for Strategic and International Studies, made the prediction after analyzing data on North Korean provocations related to South Korean elections.