UPDATE 1-Six killed in Mexico during teachers' protest against police
(Updates numbers of dead and injured, adds quote and details)
MEXICO CITY, June 19 (Reuters) - 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 government pushed through three years ago.
Enrique Galindo, the head of Mexico's federal police, said masked individuals who were not affiliated to the union were behind much of the violence, lobbing Molotov cocktails and shooting at police and civilians.
"These kinds of radicalized protests generate violence," he told a news conference in the state capital of Oaxaca City.
State Governor Gabino Cue gave the casualty figures, and said most of those who died were young people and only two had "links to the union."
The protest on Sunday near the town of Nochixtlan, about 50 miles (80 km) northwest of Oaxaca City was the latest of several in recent days that saw protesters blocking other highways with burning tires.
Earlier in the day, police escorted 120 tanker trucks carrying chemical waste from the nearby Salina Cruz refinery, owned and operated by state-run oil company Pemex. Continuación...