US President Donald Trump says that if his planned talks with North Korean leader Kim Jong-un are not fruitful he will “walk out”.
At a joint news conference, he and Japanese PM Shinzo Abe said maximum pressure must be maintained on North Korea over nuclear disarmament.
Mr Abe is at the president’s Mar-a-Lago resort in Florida for talks.
Earlier, Mr Trump confirmed that CIA Director Mike Pompeo had made a secret trip to North Korea to meet Mr Kim.
He said Mr Pompeo had forged a “good relationship” with Mr Kim – whom the US president was last year calling “little rocket man” – and that the meeting had gone “very smoothly”.
The visit marked the highest-level contact between the US and North Korea since 2000.
Mr Trump is expected to hold a summit with Mr Kim by June. Details, including a location, are still being worked out.