G-20 protestors have been tear gassed by police, according to Paul McCarrier, who was among the marchers in a parade slated for today. The march started around 3:15 and by 3:20, the police had tear gassed the crowd.
They have also deployed a sound weapon, McCarrier reports.
Riot police have been a heavy presence throughout Pittsburghall week, even showing up in force at a community picnic in a local park.
More as we know more.