ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Chilean students hurled Molotov cocktails and rocks at police in the latest mass demonstration to demand the government overhaul the educational system.<br/> <br />Most of the demonstrators -- which local reports indicated police had estimated at 45,000 while student organizers said there were more than 80,000 - remained peaceful as they marched through central Santiago streets carrying banners demanding free higher education and condemning conservative President Sebastian Pinera.<br/> <br />Students, both secondary and university, have led regular demonstrations, calling for a free and quality education for all Chileans since the protest movement started in 2011.<br/> <br />The protests have tainted Pinera's administration as student groups have staged scores of mass protests and garnered support from other social groups.<br/> <br />Several arrests were made though no official number was immediately available.