The suspect in a Toronto van attack that killed 10 people and injured 15 others on Monday attended a high school program for students with special needs, where he would often walk the halls with his head down and hands tightly clasped, according to former classmates.

Police say Alek Minassian, 25, was arrested 26 minutes after he allegedly drove a white rental van into a crowd in the north end of Toronto, sending bodies flying.

A bystander video of the incident, shown on CBC TV, shows a man repeatedly pointing an object at a police officer who shouts at him to 'get down' as the suspect demands: "Kill me."