PANAMA CITY (AP) — Panama’s president moved to assure the public on Friday that critical ports at both ends of the Panama Canal will continue to operate without interruption — a day after the country’s Supreme Court ruled that the concession held by a subsidiary of Hong Kong’s CK Hutchison Holdings was unconstitutional.

The court’s decision late Thursday advances a U.S. aim to block any influence by China over the strategic waterway and immediately drew a sharp rebuke from Beijing.

Panamanian President José Raúl Mulino said that until the court’s ruling is executed — a period of time he did not specify — Panama’s Maritime Authority would work with Panama Ports Company, the CK Hutchison subsidiary, to ensure continuing operations at the port.

Once the concession is formally ended, a local subsidiary of Danish logistics company A.P. Moller-Maersk will operate the ports in a transitional phase until a new concession can be bid and awarded, Mulino said.

“Panama moves forward, its ports will continue operating without interruption and we will continue serving the world at the logistics center of excellence that we are,” Mulino said in a recorded video address.

The court’s ruling followed an audit by Panama’s comptroller, which alleged irregularities in the 25-year extension of the concession, granted in 2021.

The Trump administration made blocking China’s influence over the Panama Canal one of its priorities in the hemisphere. Panama was U.S. Secretary of State Marco Rubio’s first overseas stop as the United States’ top diplomat. On Friday, Rubio said on X that “the United States is encouraged by the recent Panamanian Supreme Court’s decision to rule port concessions to China unconstitutional.”

Despite the insistence by Panama’s government and the canal authority that China has no influence over its operations, Rubio made clear that the U.S. viewed the operation of the ports as a national security issue. U.S. President Donald Trump had gone so far as to say Panama should return the canal to U.S. control.

The court’s brief statement gave no guidance on what would happen to the ports now.

The ruling draws backlash from Hong Kong

CK Hutchison’s subsidiary, Panama Ports Company, said it has not been notified yet about the decision but insisted its concession was the result of transparent international bidding.

It said in its statement that the ruling “lacks legal basis and jeopardizes not only PPC and its contract, but also the well-being and stability of thousands of Panamanian families who depend directly and indirectly on port activity, but also the rule of law and legal certainty in the country.”

It said that it reserves all rights to proceed legally in Panama or elsewhere, but gave no more details.

The Hong Kong government firmly rejected the ruling in a statement, saying it strongly opposes any foreign government using coercive, repressive or other unreasonable means to seriously harm the business interests of Hong Kong enterprises. It said the Panamanian government should respect the spirit of contracts and provide a fair business environment.

“Given the current situation in Panama, Hong Kong enterprises should carefully review their existing and future investments there,” it said.

In Beijing, China’s foreign ministry spokesperson, Guo Jiakun, told reporters that China would take all necessary measures to safeguard the legitimate rights and interests of “the Chinese company,” without elaborating on the potential steps.

Political analyst Edwin Cabrera said once the parties are notified, the issue of what to do with the ports goes to Panama’s executive branch, specifically the Panama Maritime Authority.

“I have the impression from conversations that I have had with some people that the operation (of the ports) will not stop,” Cabrera said.

A sale deal that apparently angered Beijing

CK Hutchison Holdings announced a deal last year to sell its majority stake in the Panamanian ports and others around the world to an international consortium that included BlackRock Inc. But the deal appeared to stall over objections by the Chinese government.

The company said last July that it was considering seeking a Chinese investor to join as a significant member of the consortium, a move that some interpreted as way to please Beijing, but CK Hutchison hasn’t said more since.

The awkward position the company found itself in highlights the challenges Hong Kong business elites face in navigating Beijing’s expectations of national loyalty, especially when relations between China and the United States are strained. CK Hutchison is owned by the family of Hong Kong’s richest man, Li Ka-shing.

Last year, Panama’s comptroller audited the concession to the Panama Ports Company, which had held the contract to operate the ports since 1997. The concession was renewed in 2021 for 25 years, during the prior Panamanian administration.

Comptroller Anel Flores said the audit found payments that were not made, accounting errors and the apparent existence of “ghost” concessions operating within the ports since 2015. The company denied those allegations.

The audit determined that the irregularities had cost the government about $300 million since the concession was extended and an estimated $1.2 billion during the original 25-year contract.

Flores also said the extension was granted without the required endorsement of his office.

On July 30, the comptroller challenged the Panama Ports Company’s contract to operate the ports before the Supreme Court.

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Associated Press writer Kanis Leung in Hong Kong contributed to this report.