President Felipe Calderón and dozens of federal agents attended the funeral of the chief of the federal police on Friday morning, a day after his assassination, even as investigators focused on the possibility that someone inside the police force had tipped off the killers to his location.
The services for the federal police chief, Commander Edgar Millán Gómez, and two other agents killed in the line of duty this week started just a half-hour after four armed men shot and killed a commander in Mexico City’s police force outside his home.
Newspapers here, moreover, were full of reports of battles between drug gangs in Sinaloa State, including one involving a bazooka. A sense that violence by organized crime had spun out of control seemed to hang over the country.
After the service, Mr. Calderón, escorted by heavier security than usual, traveled to Tamaulipas State on the border with Texas, where drug dealers have clashed repeatedly with troops and the federal police, to send the message that his administration would not be intimidated by Mr. Millán’s assassination.