Hanson said the motive for the Calgary attack was unknown. He said the suspect's father and mother are devastated.

"They are now feeling so much sorrow," he said. "Those young people are dead and they are absolutely devastated."

Hanson said the identities of the five victims —four men and a woman — will be released when autopsies are completed. He said their ages range from 22 to 27 and they were all "good kids."