Later there were claims that armed Fatah supporters had entered the campus in order to sway the results of student council elections.
In the fighting, Fatah supporters gave as good as they got.
Many Fatah supporters say they will vote for Hamas to send their own faction a message that it needs to reform or lose power.
Fatah supporters also set tires ablaze, blocking main streets, and many stores and schools closed.
The next day a Fatah supporter was defenestrated by Hamas.
Fatah supporters of Mr. Barghouti gathered angrily and another portrait went back up.
Still, some young Fatah supporters say they will not back him in this election because they believe that Fatah should remain unified.
Most of the fighters there are Fatah supporters.
His imprisonment appears to have made him even more popular among young Fatah supporters.
On Saturday morning, hundreds of Fatah supporters tried to flee Gaza through the Erez crossing into Israel.