See the last tweet:

They’re wearing eagles shirts and using green bandannas to blend.

Final update:

"All units are being held overt until further notice" Mandatory over time

Cops getting hit by bottles

"They put a light post through the front window" of building

"AntiFa showed up. People in black masks"#Eagles #Philadelphia #PoliceScanner #SuperBowl

— Matthew VinGe (@mvinge) February 5, 2018