U.S. President Donald Trump has expressed interest in meeting North Korean leader Kim Jong Un during or after his planned trip to China later this month, according to South Korea’s prime minister.

Speaking to South Korean reporters at the Korean Cultural Center in Washington on March 13, Prime Minister Kim Min-seok said Trump made the remarks during an unscheduled meeting at the White House earlier that day. 

The roughly 20-minute conversation in the Oval Office largely focused on Trump “asking for my views on the North Korea issue,” Kim said.

“He said a meeting would be very good, but