They were identifiable by their custom t-shirts, colorful chants and banners draped over the rails.
"Welcome Home Brother" banners in English and Arabic draped the center's facade.
Black funeral banners proclaiming the martyrdom of comrades drape some barriers.
A banner draped over the hole where Joe Camel once presided read, "Cut fat intake and live longer!"
Outside, banners reading "We invest in people, not just buildings" draped the hallways.
The two sides are using phone banks, sound trucks, fund-raisers and even banners draped from highway overpasses in the increasingly venomous contest.
"No to America," read a banner draped over the Abu Hanafi mosque during Friday prayers.
A huge banner draped across the road in front of the office reads: "Welcome to Fatah Land!
We don't need Batman, we've got Robin, reads the banner draped from the top tier of the Emirates stands.