North Korea warned the U.S. ambassador to South Korea that, should he continue to engage in "scheming chatter distorting the truth and instigating war," he could face a "bigger mishap" than the March incident in which he was stabbed in the face.

U.S. Ambassador Mark Lippert "needs to drop the bad habit of rashly engaging in scheming chatter distorting the truth and instigating war by taking issue with us," the North Korean Committee for the Peaceful Reunification of Korea said, Reuters reported.

"Otherwise, next time, he could face a bigger mishap than getting cut in the cheek by a South Korean citizen."

The threats were made in response to a speech Lippert gave the previous day, in which he said that North Korea could improve its relationship with the rest of the world, including the U.S., by improving its human rights record and halting its nuclear program.

The North Korean committee called his comments an "unbearable insult and mockery against us and a laughable and brazen charge that cannot be overlooked."

In March, a South Korean man wielding a fruit knife slashed Lippert in the face at a breakfast forum, leaving a seven inch-long wound that required 80 stitches. The man, charged with attempted murder, was not linked to North Korea, but Pyonyang previously called the attack "deserved punishment."