REYNOSA, Mexico, Jan 24 (Reuters) - Hundreds of heavily armed federal police patrolled cities near Mexico's border with Texas on Monday in an assault on drug cartels that have defied President Vicente Fox's government with a spate of killings.
Some 600 extra police descended on the streets of the crime-ridden cities of Matamoros, Reynosa and Nuevo Laredo, part of what Fox has called "the mother of all battles" against narco trafficking.
Army units boosted patrols in Matamoros and the government also dispatched a special police contingent trained in combating organized crime to fight cartel activity, federal police said.
"They have been specifically trained to fight drug traffickers. They know all about organized criminal activity in the (Tamaulipas) state and the capos that control it," a police official said.