A police chief and 91 officers were detained Thursday in a sweep on a city in central Mexico. The authorities are suspected of sheltering the Zetas, one of the country’s most violent drug gangs.

Federal Police Intelligence Coordinator Luis Cardenas told the AFP that the Zetas carried out kidnappings and extortion in liaison with local police around Pachuca.

A dozen army soldiers and police officers have been arrested for allegedly harboring organized crime, particularly drug trafficking.

President Felipe Calderon launched a military crackdown on Mexico’s powerful cartels two and a half years ago. Since the crackdown more than 10,000 people have died in suspected drug violence.

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