PITTSBURGH (KDKA) – Three people were arrested and four officers suffered minor injuries during a clash between Donald Trump supporters and protesters.Trump held a rally at the David L. Lawrence Convention Center Wednesday night. The mood outside the building was tense even before the Republican presidential candidate arrived.Police set up a corridor outside the Convention Center entrance, separating the two sides. Following the rally, there were more shouting matches as demonstrators confronted Trump supporters leaving the building,According to the criminal complaint, several officers were working a “skirmish line” between Trump supporters and “anarchist members in masks” and protesters. At one point, the anarchists/protesters began using pepper spray on the officers while trying to get to the Trump supporters. Click Link Below for More.