It is the second incident in little more than a year at the Key West base

A Chinese man has been charged after walking on to a US navy base and taking photographs of “sensitive military facilities”, deepening concerns over an international spying operation.

The case is the latest in a series of similar incidents and comes a little more than a year after another Chinese trespasser was charged in an almost identical case at Naval Air Station Key West, home to national security assets including fighter squadrons and the Joint Interagency Task Force South, an international alliance aimed at dismantling narco-trafficking networks.

Lyuyou Liao, 27, was charged with entering a military property for the purpose of photographing defence installations. He appeared before a judge in a federal court in Fort Lauderdale on Friday via a video link from Key West