Los Angeles ? Two men attempting to board a plane to China with nearly a dozen sensitive infrared cameras in their luggage were arrested on Saturday, a federal official said.

Federal agents stopped the pair on the jetway as they were preparing to board the flight to Beijing.

The men had been in the United States for about a week, said Rick Weir, assistant special agent in charge of the Los Angeles office of the Department of Commerce’s Bureau of Industry and Security.

Yong Guo Zhi, a Chinese national, and Tah Wei Chao, a naturalized U.S. citizen, were arrested for investigation of trying to take thermal imaging cameras with potential military use to China without the proper export licenses, Weir said.