A woman blows a whistle in front of a police line during an anti-government protest in Sofia on July 23, 2013. At least seven protesters and two policemen were injured as Bulgarian protesters clashed with police for the first time on the 40th evening of massive anti-government rallies in the EU's poorest country late Tuesday. Several thousand protesters have cordoned off the building of parliament since early evening, preventing 109 ministers, lawmakers and other officials from leaving it for more than five hours after budget revision discussions.