"Hong Kong Airlines was notified of a suspected bomb threat onboard its flight HX337 from Beijing to Hong Kong, after the plane had taken off," a spokeswoman from the airline said.
The captain of the Airbus A330-200 decided to divert "in order to ensure the safety and security of the passengers and crew" and landed the plane at around 2:30 pm local time in Tianhe International Airport in the central city of Wuhan, she said.
"All 295 passengers and crew members of the flight have since safely disembarked," she said, adding that the aircraft was undergoing security checks.
A spokesman for Wuhan airport's police told AFP that the airport was investigating the incident, without providing any further information.
Hong Kong international airport said on its website that the flight, which was originally scheduled to land in the afternoon, would arrive at 18:00 IST.