text: A North Korean propaganda unit said the U.S. ambassador to South Korea could face a 'bigger mishap' than the knife attack to his face last month if he does not stop insulting North Korea with 'laughable' accusations. U.S. envoy Mark Lippert said in a speech on Wednesday that if North Korea improves its human rights record and takes steps to end its nuclear program, it will be rewarded with prosperity and better ties with the outside world, including the United States. The North's Committee for the Peaceful Reunification of Korea said Lippert's remarks were proof that Washington was intent on hostility. Scroll Down for Video . US Ambassador to South Korea Mark Lippert (center) looks on as US Defence Secretary Ashton Carter (R) shakes hands with 7th Air Force Commander Lt. Gen. Terrence J. O'Shaughnessy (L) and US Army Gen. Curtis Scaparrotti (2nd L), commander of the United Nations Command, South Korea-U.S. Combined Forces Command and U.S. Forces Korea last week . '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 committee said in a commentary published on Thursday on the Uriminzokkiri propaganda web site. 'Otherwise, next time, he could face a bigger mishap than getting cut in the cheek by a South Korean citizen,' it said. The North frequently rails at the United States, the South's biggest ally, accusing it of preparing for imminent invasion. The U.S. Embassy in Seoul did not have any immediate comment. US ambassador Mark Lippert, 42, on his discharge from hospital after being attacked by a knife-wielding activist in March . Lippert was slashed in the face with a fruit knife by a South Korean man with a history of erratic behaviour at a breakfast forum in central Seoul that left a gash that required 80 stitches. He also suffered injuries to his arm. 'It is unbearable insult and mockery against us and a laughable and brazen charge that cannot be overlooked,' the North's agency said. South Korean police charged Lippert's attacker with attempted murder. He was not charged with any North Korea-related crime after being questioned over his multiple visits. North and South Korea are technically still at war after their 1950-53 conflict ended in a truce, not a peace treaty. Mark Lippert suffered a deep facial gash and stab wound to his wrist after being attacked by a knife wielding pro-North Korean during a breakfast forum in Seoul in March . The 42-year-old needed 80 stitches to the deep knife wound to his face after the attack . North Korea previously called the attack 'deserved punishment' but denied any role in it. In March, Lipper said that he was pretty darn good' as he was released from hospital. Mark Lippert suffered a deep facial gash and stab wound to his wrist after being attacked by a knife-wielding pro-North Korean activist during a breakfast forum in Seoul last week. Speaking as he left Seoul's Severance Hospital the ambassador said he felt 'pretty darned good, all things considered,' after the 'scary incident.' The 42-year-old, whose face was bandaged and had his arm in a brace, needed 80 stitches after being set upon. Mr Lippert refused to comment about the attack as he left hospital due to the on-going police investigation. The alleged attacker, known as an anti-U.S. activist who was previously convicted of hurling a piece of concrete at the Japanese ambassador in Seoul in 2010, was arrested at the scene. Police are seeking to bring charges including attempted murder against Kim Ki-jong, 55, for the attack at a forum discussing Korean reunification. Police said the motive for Kim's action was not known, but he shouted after the attack that he opposes the ongoing annual U.S.-South Korea military drills that North Korea condemns as a preparation for a northward invasion.
target: Mark Lippert was attacked in early March by a knife-wielding pro-North Korean activist .
  Needed 80 stitches and may have suffered nerve damage as a result .