The North Korean leader’s sister Kim Yo Jong accused the U.N. secretary-general of taking a “prejudiced and irresponsible attitude” toward tensions on the Korean Peninsula on Tuesday, after he recently warned of escalation risks along the inter-Korean border.

In a statement, Kim said Secretary-General António Guterres’ call for renewed dialogue amounted to “echoing the ROK’s unilateral and provocative sophism” in violation of the neutrality required by the U.N. Charter.

“We make it clear once again on this occasion that if the reckless military provocations of the ROK gangsters lead to an undesirable incident in the southern border area, U.N. Secretary-General