North Korea has replaced its top three military officials with younger loyalists of strongman Kim Jong Un — just days ahead of his historic summit with President Donald Trump, according to reports.

No Kwang Chol, first vice minister of the Ministry of People’s Armed Forces, took over for defense chief Pak Yong Sik, while Ri Myong Su, head of the army’s general staff, was replaced by Ri Yong Gil, South Korea’s Yonhap news agency reported.

The North’s state media previously confirmed that army Gen. Kim Su Gil had replaced Kim Jong Gak as director of the Korean People’s Army General Political Bureau, according to Reuters.

The White House, State Department, CIA and Office of the Director of National Intelligence did not immediately respond to requests for official comment.

Kim’s motivation to reshuffle his upper ranks was unclear, but analysts said the shakeup allows him and the ruling party to tighten control over the KPA at a crucial time of domestic and international developments.

“If Kim Jong Un is set on making peace with the US and South Korea and dealing away at least part of the nuclear program, he will have to put the KPA’s influence in a box and keep it there,” said Ken Gause, head of the International Affairs Group at CNA, a nonprofit research and analysis organization.

“This reshuffle has brought to the fore the officers who can do just that. They are loyal to Kim Jong Un and no one else,” he told Reuters.

The moves are likely meant to surround Kim with a younger, even more trusted cohort of officials whom he can rely on as he confronts a slew of domestic and international issues, said Michael Madden, a North Korea expert at Johns Hopkins University’s 38 North website.

“The nuclear weapons are a side issue,” he said.

Trump revived the June 12 summit in Singapore on Friday after canceling it a week earlier.

The president wants Pyongyang to “denuclearize” in return for relief from economic sanctions. The rogue regime is believed to regard nuclear weapons as crucial to its survival, while Kim has said he plans to focus on economic development.

An official at South Korea’s Unification Ministry said the government was watching the North’s leadership very closely.

Meanwhile, South Korean Foreign Minister Kang Kyung-hwa had a 15-minute phone call with Secretary of State Mike Pompeo on Monday to discuss the upcoming summit, the foreign ministry in Seoul said.