In an unusual move, the entire US Senate is being called to the White House for a briefing on North Korea.
Washington has become increasingly concerned at North Korean missile and nuclear tests and threats to its neighbours and the US.
The briefing, involving 100 senators as well as Secretary of State Rex Tillerson and Defence Secretary James Mattis, is being held on Wednesday.
China, North Korea's main ally, has called for restraint from all sides.
Washington has become increasingly concerned at North Korean missile and nuclear tests and threats to its neighbours and the US.
The briefing, involving 100 senators as well as Secretary of State Rex Tillerson and Defence Secretary James Mattis, is being held on Wednesday.
China, North Korea's main ally, has called for restraint from all sides.
