U.S. President Donald Trump said he would meet with Kim Jong Un amid heightened tensions over North Korea's nuclear weapons program if the circumstances were right.

"If it would be appropriate for me to meet with him, I would absolutely, I would be honored to do it," Trump said Monday in an Oval Office interview. "If it's under the, again, under the right circumstances. But I would do that."

The U.S. has no diplomatic relations with North Korea, and as recently as last week Secretary of State Rex Tillerson said the U.S. would negotiate with Kim's regime only if it made credible steps toward giving up its nuclear weapons and ballistic missiles.