SEOUL, Aug. 21 (UPI) — South Korea’s presidential Blue House on Friday called on North Korea to halt its “derogatory remarks” toward Seoul, one day after Kim Yo Jong mocked the South over the scaling back of joint U.S.-South Korea military drills.

“Derogatory remarks toward our government and president do not help in building mutual trust,” the Blue House said in remarks reported by Yonhap News Agency.

“We call on the North to halt unnecessary criticism and march together toward peaceful coexistence on the Korean Peninsula,” it added.

The remarks came in response to a commentary by Kim, the sister of North Korean leader Kim Jong Un, in which she derided Seoul as a “puppet” of the United States and accused President Lee Jae Myung of making “double-dealing remarks.”

This week’s decision to cut short the Ulchi Freedom Shield joint military exercise has “placed Seoul in a poor plight of discontinuing the ‘war game’ it liked very much,” Kim said in the commentary carried by the state-run Korean Central News Agency late Thursday.

She said Lee “uttered shameful words” in a social media post in which he expressed respect for U.S. President Donald Trump’s order to scale back the exercise while also pledging that South Korea would continue to build up a self-sufficient military capacity.

“Such double-dealing behavior vividly proves uneasiness and impatience of the ROK,” Kim said, using the official acronym for South Korea.

“The world witnesses that the U.S. security aids are no longer free of charge,” she added. “Seoul should be aware of the unavoidable fate of the ‘puppet.'”

The exchange comes after Trump called for the allies’ joint military drills to be “substantially reduced” in a Truth Social post Sunday, saying they are expensive and “send a signal that is totally inappropriate and hostile” to North Korea.

South Korea’s Joint Chiefs of Staff on Wednesday announced that the two sides would cut short the ongoing exercise by almost a week. The command-post portion of the exercise was set to conclude Friday, although a pared-down set of field training drills will continue through next week as originally scheduled.

The directive has been widely seen as an effort by Trump to restart diplomacy with the North, and on Wednesday he told reporters that he expected to meet Kim Jong Un this year.

In an earlier KCNA commentary, however, Kim Yo Jong downplayed the significance of the exercise reduction, calling it “unworthy of comment.”

“If the U.S. calculates that it can propagate its recent measure as the one of so-called good faith, they will not get desired answer,” she said.

On Thursday, Pyongyang fired multiple short-range ballistic missiles toward the East Sea, Seoul’s military said, marking the North’s third missile launch in less than two weeks.

The Blue House on Friday reiterated its commitment to pursuing peaceful coexistence between the two Koreas.

“As a party directly involved in building peace on the Korean Peninsula, the government will continue its close cooperation with the U.S. while making proactive efforts to help resume North Korea-U.S. dialogue as a ‘pacemaker,'” the presidential office said, according to Yonhap.