The US and South Korean military officials suspect the North might be preparing to launch missiles capable of reaching the US territory, the newspaper said.
During the 25-minutes talks, Kang said that the Seoul government is making necessary preparations for the summit with an emphasis being placed on seeking a "turning point" with regards to the overall security situation on the Korean Peninsula, including the North Korea nuclear stalemate.
"Anything could happen especially before China's party convention on 18 October and during the time between post-drills and Trump's visits in the region", said Shin Beomchul, a professor at the Korea National Diplomatic Academy in Seoul. But the growing range and accuracy seen in the North's missile tests has prompted the 29-nation alliance to review its missile defence system, which has been partially operational from a base in Romania since a year ago. US President Donald Trump's continued threats of military action against Pyongyang if it does not tame its weapons ambitions have fuelled fears of conflict on the Korean peninsula.
"The strengthening of the regular rotational deployment of U.S. strategic assets demonstrates the allies' strong commitment to the defense of the Korean Peninsula", he added.
Trump challenges Tillerson to battle of IQ tests over reported 'moron' jab
The Twitter rebuke revived rumours that Tillerson is unhappy at hs post, but he insists he has no intention of resigning. President Trump suggested he and Secretary of State Rex Tillerson should compare IQ tests in an interview out Tuesday.
North Korea conducted its sixth and most powerful nuclear test on 3 September, and has launched more than a dozen missiles this year as Kim Jong Un's regime seeks the capability to hit the continental United States with an atomic weapon. Kim responded by calling Trump a "dotard" and warning of the "highest level of hard-line countermeasure in history". This could be the Hwasong-14 inter-continental ballistic missile (ICBM), whose range could extend to Alaska, or Hwasong-12 intermediate-range missiles which Pyongyang threatened to fire towards the US Pacific territory of Guam in August, the report said.
That mission came 17 days after four US F-35B stealth fighter jets and two B-1Bs flew over the peninsula.
Some analysts suggested that North Korea might have been looking for the ideal time to maximize its impact of provocation, this time around when China holds the 19th National Congress of the Communist Party on Oct 18.
North Korea also turned its focus on Australia at the weekend, warning the United States ally of the risks of siding with Trump. "Right now we think the threat is manageable but over time, if it grows beyond where it is today, well, let's hope that diplomacy works", Kelly added.