The US Department of Interior, the agency that oversees federal land and natural resources, has grounded its fleet of more than 800 drones over concerns that they may be a security vulnerability.

According to recent reports, officials have cited worries over drones made in China, as well as drones that feature components manufactured in the nation.

The decision is the latest in a long line of security worries over Chinese gadgets.

News about the DOI’s decision comes from the Wall Street Journal, which reports that Interior Department Secretary David Bernhardt gave the order to ground the fleet and initiate an investigation into potential security vulnerabilities introduced by the drones.

The fleet may return to the skies when the investigation is over, depending on what it finds.

At the heart of the matter, according to the report, are concerns over hardware manufactured in China and its potential for facilitating espionage.

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