A US guided-missile submarine arrived in South Korea on Tuesday and envoys from the US, Japan, and South Korea met in Tokyo, as North Korea marked the anniversary of the founding of its military. Though experts thought a nuclear test or ballistic missile launch might happen, the morning came and went without either, the AP reports. South Korea's Yonhap news agency, citing a South Korean government source, reported that North Korea instead appeared to have held a major live-fire drill in the Wonsan city area. The USS Michigan, a nuclear-powered submarine, arrived at the South Korean port of Busan in what was described as a routine visit to rest the crew and load supplies.
Chinese President Xi Jinping on Monday urged restraint in a call to President Trump, as the Trump administration invited the entire 100-member Senate for a briefing Wednesday on the escalating crisis. Adding to the atmosphere of animosity, officials said North Korea has detained a third US citizen. Trump told ambassadors from UN Security Council members that the status quo in North Korea is "unacceptable" and the council must be prepared to impose additional and stronger sanctions. The US, Japan, and South Korea agreed Tuesday to put maximum pressure on North Korea, the South's envoy for North Korea said after meeting his American and Japanese counterparts in Tokyo. (Read more North Korea stories.)