North Korea's Kim Yo Jong, the powerful sister of leader Kim Jong Un, said a US, South Korea agreement this week about the need to shore up South Korean security will worsen the situation, according to state media KCNA on Saturday.
North Korea is convinced it must further perfect a "nuclear war deterrent" as a result, Kim said. The statement did not elaborate.
Kim's statement is North Korea's first comment on the meeting, and suggests its cycle of military shows of force and weapons development will continue.
US President Joe Biden and South Korean President Yoon Suk Yeol met this week, with the United States pledging to give South Korea more insight into its nuclear planning over any conflict with North Korea amid anxiety over Pyongyang's growing arsenal of missiles and bombs.
A US Navy nuclear-armed ballistic missile submarine (SSBN) will also visit South Korea for the first time since the 1980s, to help demonstrate Washington's resolve to protect the country from a North Korean attack.
The funeral ceremony for Iranian President Ebrahim Raisi, the country's Foreign Minister Hossein Amir-Abdollahian, and their companions who were killed in a helicopter crash, began in the city of Tabriz on Tuesday morning.
A would-be prince, a former judge and parliamentarian, and retired military officers were among nine alleged conspirators who went on trial on Tuesday for a suspected "Reichsbuerger" plot to overthrow Germany's democracy.
Israeli forces raided Jenin in the occupied West Bank on Tuesday in an operation that the Palestinian health ministry said killed seven Palestinians, including a doctor, and left nine others wounded.
Recovery teams refloated the huge cargo vessel in the Port of Baltimore two months after the boat crashed into the Francis Scott Key bridge and caused the span to collapse.
An infected blood scandal in Britain was no accident but the fault of doctors and a succession of governments that led to 3,000 deaths and thousands more contracting hepatitis or HIV, a public inquiry has found.