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The Mexican government has said four federal police commanders have been relieved of duty over allegations of corruption.

The move comes hours after hundreds of federal officers detained one of their own superiors in Ciudad Juarez, which sits on the border with Texas.

The federal government sent more than 5,000 federal police and soldiers to the city ravaged by drug-related violence, one of the reasons being the local police were considered too corrupt.

Al Jazeera’s Mark Orchard reports. (Aug 09, 2010)