Traveller beheads fellow bus passenger
A passenger travelling across Canada's Western plains on a bus stabbed, gutted and decapitated a man seated next to him, and then taunted police with the head, a witness told media.
The victim, believed to be 18-years=old, had been sleeping with headphones on his ears before he was repeatedly stabbed in the chest by the man with a "big Rambo knife", witness Garnet Caton told public broadcaster CBC.
The other 35 passengers and the driver were jolted by "blood-curdling screams" and fled, bracing the door on their way out to trap the assailant inside the bus.
"He must have stabbed him 50 times or 60 times," said Caton.
When Caton and two others returned to check on the victim, he said they saw the attacker "cutting the guy's head off and gutting him".
"While we were watching ... he calmly walked up to the front (of the bus) with the head in his hand and the knife and just calmly stared at us and dropped the head right in front of us."
"There was no rage in him and he wasn't swearing or cursing or anything, it was just like he was a robot or something."
Moments later, police surrounded the bus and arrested the man after a nearly three-hour standoff, he said. "He was taunting police with the head in his hand out the window," said Caton.
The Royal Canadian Mounted Police said they were investigating a "major incident" that occurred at 9pm Wednesday (1200 AEST Thursday) on a Greyhound bus travelling eastbound from Edmonton to Winnipeg, but offered no details.
Public Safety Minister Stockwell Day called the attack "horrific".