Mexico beats grim record for monthly murder tolls

June was the most murderous month Mexico has seen in at least two decades, official statistics showed, underlining authorities' powerlessness to check a growing wave of violence.Last month saw 2,234 murders, up from 2,191 in May, according to the executive secretariat of the National Public Security System.The states of Guerrero, a drug cartel-prone territory in the south, and Mexico, surrounding the capital's federal district, recorded the highest numbers.