New | Chinese man charged with trying to take US military information to China

A former Connecticut resident and Chinese citizen who allegedly worked on the F135 engine was charged with trying to take sensitive documents about military technology to China, according to a criminal complaint unsealed on Tuesday.

Yu Long was en route to China last month via Newark Liberty International Airport in New Jersey when customs officers found proprietary documents in his luggage that included equations and test results used to develop titanium for US military aircraft, prosecutors said.

He was arrested two days later in Ithaca, New York.

US defence officials have sounded the alarm in recent years about increased efforts by China, Russia and other countries to gain access to the United States’ military technologies.

Between 2008 and earlier this year, Yu Long worked as a senior engineer for a Connecticut defence contractor. He said he worked on the F119 and F135 engines, which are used in US fighter aircraft and manufactured by the United Technologies Corporation.

Yu Long worked for the United Technologies Research Centre, which does research for the conglomerate, a source familiar with the case said. He was released in May when the investigation began, said the source, who was not authorised to speak publicly.