This is one of a number of tags at the defunct BP station at University and Hamline Avenues. This is very near the Target that served as a site of intense conflict between protestors and the police.
The top piece is a black outline tag of a hand giving the middle finger with a pig face beneath it. Beneath these are pieces that may or may not be related.
Source
This is part of a cluster of graffiti at the defunct BP station at University and Hamline Avenues.