Mexico hit by student massacre: At least 17 anti-corruption protesters 'are rounded up, murdered and dumped in a mass grave' - and another 26 are missing

                      

State prosecutors said a man they arrested told how 17 of the missing youths were rounded up and killed, then thrown in pits in Iguala, Guerrero state, (pictured) where remains have now been unearthed. The bodies found by authorities are so damaged that they could not be identified. All that is left are bones and small pieces of flesh.