Chinese authorities reportedly in possession of F-35 components in Hong Kong

A U.S. Marine Corps F-35 fighter jet touches down at the former Roosevelt Roads military base in Ceiba, Puerto Rico, September 30, 2025.

Ricardo Arduengo | Reuters

Chinese authorities are reportedly in possession of F-35 stealth fighter parts after components of the aircraft were "inexplicably diverted to Hong Kong."

Shipping giant UPS was sending a cockpit canopy and weapons bay door to the U.S. from Australia in late May when it was diverted, Bloomberg reported on Thursday, citing sources.

Both parts were coated with a radar absorbing material that enhances their stealth capabilities, the sources said, and it was not clear why the shipment was diverted to Hong Kong.

On Tuesday, Australian Defense Minister Richard Marles told reporters Tuesday that Australia was aware of the shipment, and was working with the U.S. and Lockheed Martin to see how Canberra can assist in the investigation.

Marles also said it was his understanding that no sensitive parts were in the missing shipment, according to CNN.

Lockheed Martin, UPS and the Pentagon didn't immediately respond to requests for comment from CNBC.

The F-35 is a fifth-generation stealth fighter made by Lockheed Martin, and Washington controls the sale of these aircraft only to its closest partners and allies.

For example, Turkey was excluded from the F-35 program in 2019 after the country purchased the Russian S-400 anti-aircraft system, which raised fears that the Russian system could be used as an intelligence collection platform to learn about the aircraft's capabilities.

China has targeted F-35-related U.S. military data in past espionage cases, according to U.S. prosecutors in 2024.

A $24 billion sale of F-35s to Saudi Arabia was approved last week, but some lawmakers in Congress have already expressed concerns over the technology finding its way into Chinese hands.

Congressman Raja Krishnamoorthi (D-IL) said that the U.S. intelligence community has warned that the sale "could put the crown jewels of American military technology within reach of the Chinese Communist Party."

Users of the fighter jet include Australia and Belgium, as well as the U.S. itself, with other countries like Japan, Canada and Singapore having also ordered the aircraft.

F-35s have also been used by the U.S. during the Iran conflict, with one aircraft suffering damage from enemy fire, according to the Department of Defense.