Bus rider stabbed, decapitated

(CNN) - As horrified travelers watched, a Greyhound Canada bus passenger repeatedly stabbed and then decapitated the young man sitting beside him, who was sleeping with his head leaning against the window, a witness said Thursday.

"Everybody got off the bus. Me and a trucker, who stopped, and the Greyhound driver ran up to the door to maybe see if the guy was still alive or we could help or something like that," said witness Garnet Caton.

Greyhound declined to comment other than to "confirm that there was an incident on one of our buses."