Six people have died and 53 were injured in Mexico 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 on Sunday 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 radicalised 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 80km northwest of Oaxaca City was the latest of several in recent days that saw protesters blocking other highways with burning tyres.
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.
On Friday, Pemex warned it could be forced to shut operations at the refinery in "a few days" if the highway blockade persisted.
The unrest escalated after police arrested the leader of the local teachers' union during the previous weekend. Ruben Nunez, head of one of the most combative factions of Mexico's CNTE union, was detained on suspicion of corruption.
Nunez is secretary general of the CNTE's Section 22 in Oaxaca, a hotbed of resistance to government efforts to reform the education system.
Similar, if less violent protests, have frequently caused chaos in Mexico City. CNTE has led efforts to resist the education reform, in particular its mandate to carry out evaluations of teachers.
Response: This article describes the current unstable political situation in Mexico A local teacher's trade union, CNTE, is protesting against the government. The demonstration is rather serious because anti-rioting police are involved to curb the protests. Also, the crisis worsens as more protesters are getting injured and even dying. I detected a substantial amount of bias in this article. First of all, the article does not specify why the protests are being held. By not indicating the teacher's reasons then it implies that they did not have a valid reason. Furthermore, the phrase: "a hotbed of resistance to government efforts to reform the education system" is very biased. This phrase describes the protests as a defiance to the government. But the phrase then goes on to describe what the government has been doing and the word reforms implies that the government has been actively working to improve the teacher's conditions. Also, this article is very vague when it mentioned that there were masked people who shot at the police and civilians. It does not expound on who it could be and their purpose for instigating violence. Other than that the article informed the public on the current crisis in Mexico, but I would encourage people to read other articles regarding the same issue.
Source: "Six Killed during Teacher Protests in Mexico." Sky News.com.au. Australian News Channel Pty Ltd, 20 June 2016. Web. 20 June 2016.