The army said in a statement distributed Wednesday by the state-run news agency that it is studying a plan to create an "enveloping fire" in areas around Guam with medium- to long-range ballistic missiles. The U.S. territory is home to Andersen Air Force Base.
The statement says the move is in response to a recent U.S. ICBM test.
It comes as President Donald Trump says North Korea "will be met with fire and fury like the world has never seen" if it makes any more threats to the U.S.
A Japanese defense paper and a U.S. media report Tuesday said North Korea may have successfully produced a miniaturized nuclear warhead that can fit inside its missiles.
