Toronto: 

Yummy: Vince Weiguang Li is accused of stabbing, beheading and cannibalising a man on a Greyhound bus in Canada. pic/ap

A man accused of beheading and cannibalising another passenger on a Greyhound bus in Canada pleaded in court for someone to 'please kill me,' and was ordered to undergo a psychiatric evaluation.

Prosecutor Joyce Dalmyn, who argued for the evaluation, revealed new details about the attack, which occurred last Wednesday night. She said Vince Weiguang Li had a plastic bag containing his victim's ear, nose and mouth in his pocket when officers arrested him. "The only response officers received from him was, 'I have to stay on the bus forever,'" Dalmyn said.

The accused carried the victim's severed head back and forth on the bus taunting officers. Armed with a knife and a pair of scissors, he was also observed cutting body parts from the victim and eating those body parts, she said.

After his arrest, Li  indicated in a low voice that he was guilty, she said.

Li, who immigrated to Canada from China in 2004, is charged with second-degree murder in the slaying of 22-year-old carnival worker Tim McLean - an attack which witnesses aboard the bus said appeared to be unprovoked.

He was scheduled to appear yesterday in court in Portage La Prairie, Manitoba, to determine whether he should undergo psychiatric testing.