The Chinese spy balloon that floated over the U.S. early this year was loaded with American-made equipment that helped it collect photos, videos and other information, U.S. officials said, citing preliminary findings from a closely held investigation.

Several defense and intelligence agencies, along with the Federal Bureau of Investigation, have analyzed the debris retrieved after the U.S. military detected and shot down the balloon nearly five months ago in an event that added fresh, unexpected volatility to the already fraught U.S.-China relationship.

That analysis found the balloon was crammed with commercially available U.S. gear, some of it for sale online, and interspersed with more specialized Chinese sensors and other equipment to collect photos, video and other information to transmit to China, the officials said. Those findings, they said, support a conclusion that the craft was intended for spying, not weather monitoring as Beijing has said.