This just in from the police:

This afternoon, Wednesday October 19, 2011, at 3:39 p.m., Portland Police officers responded to the report of a man arguing with people at Southwest 4th and Salmon Street, next to the Lownsdale Park encampment of Occupy Portland. Officers arrived in the area and learned that the man displayed a handgun and walked towards 3rd and Salmon. Officers located the man at 3rd and Salmon and he was taken into custody. A firearm has been recovered.

It's unclear whether he was involved in Occupy Portland or was some sort of raving anti-Occupy person, but either way it's scary to have someone waving a gun near a busy protest.

Update 5:21pm—Okay, KGW posted a video of the fight, but I just watched it twice and still have no idea what's going on. It's definitely a shouting match between a black guy in a sweatshirt and a group of young Occupy folks wearing bandanas over their faces (plus the requisite "guy waving peace signs") but how the fight started or what it's about it unclear.