Hundreds of protesters in Guerrero state vented their anger yesterday at the callousness of Mexican Attorney General Jesus Murillo Karam by attacking government buildings and burning cars in the capital, Chilpancingo.

They erupted after Mr Murillo had demanded an end to media questions by stating: “Enough, I’m tired.”

He had just explained that members of a narcotics gang had admitted killing and burning the bodies of 43 students who went missing in the town of Iguala in September.

Mr Murillo said that they had been killed on police orders.

Three members of the Guerreros Unidos drug gang said that the students had been handed over to them by police.

Some students had been asphyxiated and others shot dead before the gangsters set fire to the bodies.

Mr Murillo warned that it would be difficult to identify the charred remains and that authorities would consider the students missing until DNA tests confirm the identities.

He showed video confessions by the suspects, who had loaded the students into dumper trucks and taken them to a landfill site in Cocula near Iguala.

However, when he ended his press conference abruptly, citing his tiredness, the phrase went viral as a hashtag on social networks.

“Enough, I’m tired of living in a narco-state,” “Enough, I’m tired of corrupt politicians” and similar examples were tweeted widely.

Manuel Martinez, a spokesman for the students’ families, said that the “Enough. I’m tired” response was proof that their demand for answers was gaining strength.

“The people are angry and I hope that they continue support us,” he said.