Canadian officials have detained a young Asian man who apparently boarded a flight from Hong Kong to Vancouver disguised as an elderly white male.
Canadian Border Services said the man wore a silicone mask covering his head and neck in what they called an "unbelievable case of concealment".
Suspicions were raised when an apparently elderly passenger was noticed with young-looking hands.
Later he emerged from a washroom looking like a man in his twenties.
An internal intelligence alert from the Canadian Border Services Agency (CBSA) showed before-and-after photos.
The passenger was seen at the start of the flight as an "elderly Caucasian male who appeared to have young-looking hands," the CBSA bulletin said.