Canadian authorities are searching for a motive behind the shooting rampage Wednesday at a college in Montreal that left one person dead and 19 others wounded.

Police shot and killed the gunman. They identify him as 25-year-old Kimveer Gill.

Online postings tied to Gill on show photographs of him in various poses with a firearm, and with a profile that says "you will come to know him as the angel of death."

Witnesses of the midday attack at Dawson College say Gill was dressed in a black trench coat and began shooting outside the school. They say he then entered a cafeteria, and continued shooting at random.

Authorities say they believe Gill acted alone, and that racism or terrorism did not play a role in the attack.

The online postings tied to Gill say he liked to play a video game that simulated the 1999 Columbine school shootings in the U.S. state of Colorado. Two students in black trench coats killed 13 people in that attack before turning the guns on themselves.

Montreal was the scene of another school shooting in December 1989, when a man opened fire at Ecole Polytechnique and killed 14 women. He then committed suicide.

Some information for this report was provided by AP.