There have already been reports of activity in Oakland CA and Baton Rouge.
There is also apparently some sort of large protest in Times Square.
It seems to be ramping up in OaklandProtesters on hiway in #Oakland commandeer truck, project #blacklivesmatter on it. #AltonSterling #PhilandoCastile pic.twitter.com/u174ehi9U3— Occupy Oakland (@OccupyOakland) July 8, 2016