South Korea deployed four remaining US anti-missile THAAD system launchers on Thursday created to protect against mounting threats from North Korea while protesters clashed with thousands of police in Seongju City, the deployment site. The July date refers to the intercontinental ballistic missile test.
Trump also said North Korea "is behaving badly and it's got to stop".
Putin and Abe held a bilateral meeting Thursday, after which both leaders reiterated their countries shared a common understanding of the threat that North Korea poses. The Swedish Embassy in Pyongyang also provides consular services for the United States, Australia and Canada.
The concept of containment comes as the USA and its allies plan to go to the UN Security Council with major new sanctions, including cutting off China's oil supply to North Korea and imposing an asset freeze and travel ban on leader Kim Jong-un.
The text is being negotiated among council members this week.
North Korea on Thursday pledged to take "powerful counter measures" against USA pressure or any new sanctions stemming from its missile programme, accusing Washington of wanting war.
Russian Federation has described the draft resolution as a "little premature" and put forward a plan in which the US and South Korea would stop major exercises in exchange for North Korea halting its weapons programmes.
Jin Qiangyi, a professor at the Center for North and South Korean Studies at Yanbian University, said cutting off North Korea's oil supply was could mean "trouble" for China.
"It doesn't seem much time is left before North Korea achieves its complete nuclear armament", the Prime Minister said at a meeting of defence officials here.
Trump spoke with Xi of China, the country seen as having the most influence on its unruly neighbor and key to getting any sanctions regime to stick.
Dozens were injured earlier as police sent thousands of officers to remove hundreds of protesters from a narrow road leading to the site.
"Given the new developments on the Korean peninsula, China agrees that the UN Security Council should respond further by taking necessary measures", he told a press conference in Beijing.
The Chinese president told Trump there should be a peaceful settlement of the issue, adding that dialogue combined with a set of comprehensive measures was best for seeking a long-term solution, according to the Xinhua news agency. "Only when the two are put together can it unlock the nuclear issue of the Korean Peninsula".
Last week, North Korea's leader Kim Jong-un ordered the production of more rocket warheads and engines, shortly after the United States suggested that its threats of military action and sanctions were having an impact on Pyongyang's behavior.
"The situation is very grave".
The sources added that the British Foreign Office is investigating whether "current and former nuclear states" helped the North Korean regime with its nuclear program.
It also revealed how Russian Federation is developing the capacity to play spoiler to USA plans to increase pressure on North Korea.
The news also prompted a demonstration by about 400 residents near the Seongju base, about 300 kilometers south of Seoul.