The U.S. Defense Department accidentally shipped non-nuclear ballistic missile components to Taiwan, the Pentagon said Tuesday.
Four nose-cone fuses for intercontinental ballistic missiles were shipped instead of helicopter batteries that Taiwan had requested, Air Force Secretary Michael Wynne said.
The fuses were shipped to Taiwan in the fall of 2006 and kept in a warehouse there. The Taiwanese military informed the United States last week about their presence on the island.
"There are no nuclear or fissile materials associated with these items," Wynne said. "The United States is making all appropriate notifications in the spirit of candor and openness in an effort to avoid any misunderstanding."
An investigation is under way, he added.
"In an organization as large as DOD, the largest and most complex in the world, there will be mistakes. But they can not be tolerated in the arena in strategic systems, whether they are nuclear or only associated equipment, as was in this case," Principal Deputy Undersecretary of Defense Ryan Henry said.
He said the parts were 1960s technology, designed for use with Minuteman ballistic missiles.
Officials said China, which considers Taiwan to be a renegade province, has been notified about the mistake.
Wynne said the missile components were first shipped from F.E. Warren Air Force Base in Wyoming to Hill Air Force Base in Utah in 2005.
On arrival at Hill, they should have been placed in the classified storage section, Wynne said, but were instead moved to a storage area for unclassified items.
He said stocks at the Utah base should be checked quarterly and a key part of the investigation will be determining how those checks did not turn up the missile parts before they were shipped to Taiwan.