U.S. President Donald Trump said on Wednesday he would know next week whether his summit with North Korean leader Kim Jong Un would take place on June 12 in Singapore as scheduled.

US President Donald Trump has cast further doubt on plans for the unprecedented meeting on Wednesday.

Speaking from the White House before boarding Marine One on Wednesday, Trump said, "Someday a date will happen," for the North Korea talks, adding, and "It could very well be June 12."

Trump did not say, however, whether the preparatory talks between U.S. and North Korean officials in coming days were expected to clarify the situation.

On Tuesday, Trump expressed doubts about the June 12 meeting taking place as scheduled when he hosted South Korean President Moon Jae-in at the White House.