Julie Paskall, 53, a volunteer timekeeper for her son's hockey team, was assaulted Sunday night in a parking lot while waiting to pick up her son. She had been on life support since the attack.
"The motive for this unprovoked attack remains robbery" with police "continuing to work toward finding out who is responsible," Sgt. Adam MacIntosh said in a statement.
Police also were trying to determine if a Dec. 16 attack in which a 22-year-old woman was injured at a nearby Newton bus loop was related, the Canadian Broadcasting Corp. reported.
No suspect descriptions had been issued by police in either case, the CBC said.
Dennis Rodman pledges to end trips to North Korea
Senate Democrats to pull all-nighter on climate change