The North instead carried out what appears to be its largest-ever firing drill to mark the 85th founding anniversary of its armed forces around the eastern port city of Wonsan.
After the mounting threats from North Korea of a 'super-mighty preemptive strike' and an active H-Bomb, Kim Jong Un's state media has claimed their military operation has already been deployed.
USA officials said Wednesday's briefings will center on three key issues: intelligence about the North's capabilities; US response options, including military ones; and how to get China and other countries to enforce existing economic sanctions on Pyongyang, along with ideas for new penalties.
Nikki Haley, Mr. Trump's United Nations ambassador, said the USA isn't looking for a fight with Kim and wouldn't attack North Korea "unless he gives us reason to do something".
"North Korea's a big world problem, and it's a problem we have to finally solve". "We believe China has a very, very important role to play", said the USA envoy for North Korea policy, Joseph Yun.
South Korea said in a statement Wednesday that unspecified parts of THAAD were deployed.
Around 30,000 American troops are stationed in South Korea as part of a military strategy that Pyongyang condemns as a preparation for war.More news: Turkey threatens further strikes on US-allied Syrian Kurds
North Korea's drills coincided with military exercises held by US and South Korean navies in the Yellow Sea, off the western coast of the Korean Peninsula.
The deployment of a U.S. Navy strike group - which will be joined by two Japanese destroyers and South Korean ships - to the Korean Peninsula is a show of force and a clear warning to North Korea.
"Cooperation with China and Russian Federation is the most important for effective pressure on North Korea", he said.
Upon arrival, the Carl Vinson is expected to hold joint exercises with the South Korean Navy.
Meanwhile, a sixth North Korean nuclear test has been anticipated for some months now.
On Wednesday, Tillerson, Defense Secretary Jim Mattis, Director of National Intelligence Dan Coats and Joint Chiefs chairman General Joseph Dunford, are to hold a rare briefing on North Korea at the White House for the entire U.S. Senate.
Air China, the only Chinese airline that provides regular flights to North Korea, announced on Tuesday that it will resume flights between Beijing and Pyongyang from May 5.More news: Wang-Tillerson meet amid tensions in Korean peninsula
And on the pressure and deterrence fronts, Trump is pushing to get more help from China, Pyongyang's main protector.
A senior Republican senator says he emerged from a dinner meeting with Donald Trump confident the president will not allow North Korea to build a nuclear-tipped missile capable of striking the United States.
The North Korean crisis is moving on many fronts. The key, Graham added, is to make North Korea realize there's a "new sheriff in town".
Chinese President Xi Jinping spoke to Mr Trump on Monday, urging all sides to "maintain restraint and avoid actions that would increase tensions".
The reasons for the detention of Tony Kim, who taught accounting at the Pyongyang University of Science and Technology, were not immediately clear.
North Korea's unlawful weapons programs represent a clear, grave threat to United States national security. It also launched a long-range rocket past year that delivered a satellite into orbit, which Washington, Seoul and others saw as a banned test of missile technology.More news: Sports English FA Names Referee For Arsenal, Chelsea FA Cup Final