Mexico deploys troops to curb drug violence
22 September 2012 Last updated at 09:48 BST
Around one thousand troops and federal police have been deployed to a suburb of Mexico City to combat worsening drug violence.
It is the first time during Mexico's drugs war that such a military operation has been deployed to part of the metropolitan area of Mexican capital.
The move follows a rise in fighting between rival drug gangs.
Will Grant reports from Mexico.