Missile test over japan was a "mere curtain-raiser" - north korea

North Korea's promising its recent missile launch over Japan - which has been condemned by the United Nations - was a "mere curtain-raiser".

It says more rockets will be fired - but hasn't confirmed the target. Kim Jong Un's already suggested he'll strike Guam, which has a major U.S. military presence. Speaking in Japan, British Prime Minister Theresa May says North Korea's neighbour has an important role.