United Airlines flight 1104 had to make an emergency landing at Vancouver International Airport, Canada, on January 9.
The plane, heading from Anchorage, Alaska, to Denver, Colorado, was diverted after the crew discovered a threatening message from a passenger.
The plane landed uneventfully. There were 131 passengers and 6 crew members aboard at the time; all of them remained unhurt.
The Royal Canadian Mounted Police office in Richmond, British Columbia, confirmed that they took the suspect in custody.