U.S. authorities are investigating a reported diversion of F-35 fighter jet parts that were shipped from Australia and ended up in Hong Kong instead of reaching the United States. Multiple outlets report that the matter has prompted scrutiny in Washington, including congressional interest, as the parts are linked to the U.S. military’s most advanced stealth aircraft.

The accounts describe concerns that the components could be accessible to Chinese entities, raising worries about possible reverse engineering of classified or sensitive technologies. Bloomberg and other reports cite that House and defense-policy oversight bodies are examining the incident, while the U.S. Defense Department is also investigating how the shipment was handled and where the parts came under control.

Outlets differ on emphasis and specific details. Some focus on the security implications and the possibility that China could gain access to advanced technology, while others highlight the logistical or procedural failure involved. Hong Kong authorities, according to one report, decline to comment on the allegations. Separate reporting also notes that at least some parts supplied by Lockheed Martin are associated with radar-absorbing coatings.