I understand FOX O&O stations in some other markets, including Minneapolis and San Francisco, either went split screen or went exclusively with news coverage of the shooting (using a Fox News Channel feed). Atlanta, like Detroit, went with baseball nonstop from what I understand.
We may not know all of the markets that ran news coverage until Monday afternoon. Fox was in a tough position, because they had an exclusive on this game, and they also had live events running on FS1 and FS2. So they couldn't move the baseball, and left it to affiliates to decide. Tough choice, since continuing coverage was commercial free, and the affiliates likely had paid spots for baseball. New York was easy since Fox owns both channel 5 and 9.