A woman walking near a bustling intersection in downtown Toronto was allegedly pushed to the ground in a "reportedly unprovoked" daytime attack that left her dead, police said Friday after arresting a man in the case. Police said the alleged assault happened just north of Yonge Street and King Street, in Toronto's financial district, a little after 11:30 a.m. The woman, who was in her 70s or 80s, had serious head injuries and died at the scene, they said.