A Chinese satellite company linked to the country’s military is supplying Iran-backed Houthi rebels in Yemen with imagery to target US warships and international vessels in the Red Sea, according to American officials.

The Trump administration has repeatedly warned Beijing that Chang Guang Satellite Technology Co Ltd, a commercial group with ties to the People’s Liberation Army, is providing the Houthis with the intelligence, according to the US officials.

“The United States has raised our concerns privately numerous times to the Chinese government on Chang Guang Satellite Technology Co Ltd’s role in supporting the Houthis in order to get Beijing to take action,” said a senior state department official.

The official added that China had “ignored” the concerns. He also told the Financial Times that CGSTL’s actions and “Beijing’s tacit support” despite Washington’s warnings was “yet another example of China’s empty claims to support peace”.

“We urge our partners to judge the Chinese Communist party and Chinese companies on their actions, not their empty words,” the official said.

The concern about CGSTL comes amid a deepening trade war between the Washington and Beijing after President Donald Trump slapped huge new tariffs on imports from China, which are now subject to a 145 per cent levy.

The Houthis started attacking vessels in the Red Sea, a critical maritime route for global trade and the US navy, after Israel launched a war against Hamas, another Iran-backed group, in 2023, in response to the Palestinian militant group’s October 7 attack.

The US has escalated attacks on the rebel group’s positions in Yemen in recent weeks, including a large military strike that was the subject of the Signalgate leak and signalled an escalation of the campaign.

China has expressed concern about the Houthis’ attacks. The Biden administration urged Beijing to use its leverage with Iran to rein in the Houthis — but his officials saw no evidence that Beijing had done so.

Trump has made tackling Red Sea instability a priority, amid concerns that the Houthis continue to pose a threat to the global economy.

“Beijing should take this priority seriously when considering any future support to CGSTL,” said the US official.

Asked about the US claims about the satellite company, the Chinese embassy in Washington said it was “not aware of the relevant situation”.

CGSTL has previously come under US scrutiny, and was among groups hit by sanctions in 2023 for allegedly providing high-resolution satellite imagery to Wagner Group, the Russian mercenary army that helped President Vladimir Putin prosecute his full-scale invasion of Ukraine.

The Chinese company was established in 2014 as a joint venture between the provincial government in Jilin and a branch of the Chinese Academy of Sciences in Changchun, the province’s capital.

“Chang Guang is one of a handful of ‘ostensibly’ commercial Chinese satellite companies that are in fact deeply embedded in the military-civil fusion ecosystem, supplying global surveillance capabilities to both civilian and military customers,” said James Mulvenon, an expert on the Chinese military and intelligence services at Pamir Consulting.

Under China’s military-civil fusion programme, companies must share technology with the PLA when ordered by the government.

Matthew Bruzzese, a China defence expert at BluePath Labs, a consulting firm that works with the US government, last year said CGSTL had 100 satellites in orbit, although it plans to have 300 by the end of 2025 which would enable it to take repeat images of any location in the world every 10 minutes.

Bruzzese said CGSTL had “close connections” to the Chinese government, communist party and military. But he there were fewer public mentions about its PLA ties from 2020, suggesting that it had “become more wary of publicly discussing these connections”.

The US has in recent years imposed sanctions on dozens of Chinese commercial groups with alleged connections to the military.

Bruzzese added that CGSTL had provided briefings to senior Chinese officials about its applications, including those for “military intelligence” and had demonstrated its technology before several top PLA officers, including Zhang Youxia, the top general in the Chinese military who is second-in-command after President Xi Jinping.

US concerns about CGSTL come as the Pentagon increasingly focuses on Chinese military activity in space.