The wave of killings includes murders in Guanajuato and Sinaloa, as well as the assassination of a mayor and his secretary.

President Claudia Sheinbaum called for increased intelligence to curb the violent crime that gripped Mexico under her predecessor, who oversaw one of the deadliest periods in the country’s recent history.

So far this year, from January to August, homicides were down 10.7% from their peak in the same period of 2018, but that year was an outlier because of cartel turf battles. The 20