Six people were killed and 53 injured in Mexico on Sunday when clashes broke out between members of a teachers' trade union and police at a protest that police say had been infiltrated by armed individuals who shot at officers and threw petrol bombs.
The violence erupted as anti-riot police moved in to dislodge protesters blocking a highway in the southern state of Oaxaca. Television footage showed chaotic scenes of men running from police as gun fire rang out.
It was the worst incident in a spate of protests over the past several months against education reforms that the . . .
