WASHINGTON  — North Korea fired short-range missiles this past weekend, just days after the sister of Kim Jong Un threatened the United States and South Korea for holding joint military exercises.

The missile tests were confirmed by two senior Biden administration officials who briefed reporters on condition of anonymity. They come as North Korea has ignored offers from the new administration to resume negotiations, and Secretary of State Antony Blinken last week pressed China to use its “tremendous influence” to convince North Korea to abandon its nuclear program.

The officials, however, sought to downplay the significance of the missile tests, noting that they are not covered by UN Security Council resolutions meant to deter North Korea from pursuing a nuclear program.

“We’ve learned nothing much has changed,” Biden said about North Korea in a brief exchange with reporters following a speech on health insurance in Columbus, Ohio.

Warning from Kim Jong Un’s Sister

The Biden administration has been open about its desire to engage the North in negotiations even as the regime has batted away calls for the two nations to talk. In North Korea’s first comments directed at the Biden administration, the North Korean leader Kim’s powerful sister earlier this month warned the United States to “ refrain from causing a stink” if it wants to “sleep in peace” for the next four years.

Kim Yo Jong’s statement was issued as Blinken and Defense Secretary Lloyd Austin arrived in Asia to talk with U.S. allies Japan and South Korea about North Korea and other regional issues.

Relations between the U.S. and North Korea, once hailed as potentially promising after former President Donald Trump’s three meetings with Kim, have been tense with no substantive contact for more than a year.

The last face-to-face talks between senior officials from the two countries were held in Sweden in October 2019 and efforts by the Biden administration to resume a dialogue have been rebuffed since February.

Since Trump’s first meeting with Kim in Singapore in 2018, the North has not conducted nuclear or long-range missile tests, although analysts believe they have pressed ahead with their programs on both. And, the North has not given up short- and medium range missile testing.

North Korean officials have not been in contact with U.S. government officials in more than a year, spanning two administrations, one of the senior administration officials noted.

Biden Administration Consulting with Trump Officials

Biden administration officials have been consulting with Trump administration officials who took part in the Singapore talks as well as a second meeting between Kim and Trump in February 2019. Some Trump officials in their talks with the Biden team speculated that the impact of the coronavirus pandemic and a broader reconsideration of engagement with the United States could explain the North’s radio silence, according to one official.

Kim is in the midst of the toughest crisis of his nine-year rule as the already-troubled economy was hit by pandemic-related border closings that have sharply reduced the North’s external trade. The North also faced a spate of natural disasters last summer not to mention the persistent U.S.-led sanctions.

But a Biden administration officials added that the Biden administration does not view the weekend’s missile tests as closing the door to such talks.

National security adviser Jake Sullivan is also scheduled to meet next week with his South Korean and Japanese counterparts for talks about the way forward with North Korea.