ROUGH CUT (NO REPORTER NARRATION)<br/> <br />Thousands of supporters and foes of President Nicolas Maduro took to the capital's streets for rival rallies marking a month since the first bloodshed in the recent unrest around the South American OPEC nation.<br/> <br />Trouble began when National Guard troops blocked opposition marchers from leaving Plaza Venezuela to head to the state ombudsman's office.<br/> <br />Students threw stones and petrol bombs while security forces fired tear gas and turned water cannons on them.<br/> <br />Reuters witnesses saw dozens of people leaving injured.
