Didn't see anyone else posting on this. About 9:30 am today protesters from the Costambar area blocked the bridge in front of the Free Zone so no one could pass from POP or Santiago. A big mess for about 90 minutes then the troops came and after attempted negotiations, I presume, enough was enough and tear gas was fired first and then shots were fired. Traffic began moving about 11:10 am and all was clear about 1 pm. Rumor has it the protest was about continual flooding in the poorer areas of Costambar.