Drug-related violence has claimed nearly 40,000 lives since President Calderon launched a war against organized crime four years ago
Marchers voice support for Mexican poet Javier Sicilia and families of thousands of victims of country's drug war
More than 3,000 federal, state, local law enforcement personnel conducted raids in major cities, arresting nearly 700 suspects
Foreign Minister Patricia Espinosa says remarks by top US Army official comparing drug war to 'insurgency' were 'totally unacceptable'
Scores of residents were evacuated from the rain-drenched area
Bad weather, blocked roads and damaged bridges interfering with rescue efforts
Nuevo Leon Governor Rodrigo Medina reacts to the murder of a mayor by presumed drug traffickers
