From the News.ca.msn.com article, As many as 5 stabbed in Yonge/York Mills office in Toronto, we see an updated time of 10:36:03 GMT, which would be 6:36:03 AM EDT in Toronto.
Here is a screen capture I made of three articles in a Google search for “stabbing york mills”, showing two articles posted after the event, and this one 5 hours before, when it was at 11:17 AM EDT.
Update at 7:00 PM EDT:
I also searched Bing, confirming it’s not some bug with Google, and it also shows the MSN story being posted three hours before the reported stabbings.
Also, I am including the cached version, which is the original article, showing a post time of 10:24:15 GMT, which would be 6:24 AM EDT. Some have questioned whether it’s an West Coast/East Coast timing issue, where the article may have been written on the West Coast and published on an East Coast server, but notice that the story reports the stabbings as taking place around 9:30 AM EDT, and if that was the explanation this article still would have been published as late as 9:24 EDT — before the reported stabbings.