U.S. President Donald Trump on Monday he would deal with North Korea “very strongly,” in brief remarks at a press conference with Canadian Prime Minister Justin Trudeau held in the White House.

“Obviously North Korea is a big, big problem and we will deal with that very strongly,” the President told assembled reporters.

The remarks come after North Korea successfully tested a medium-range ballistic missile on Sunday. The new administration has so far offered little concrete insight into their North Korea policy going forward, though Trump did say the U.S. stood with Japan “100%” as news of the test broke