By Adriana Gómez Licón / EL PASO TIMES
A graffiti message found Sunday night in Juárez warned U.S. law enforcement that another car bombing will occur if they do not arrest corrupt federal police agents.
The unsigned message told the FBI and the U.S. Drug Enforcement Administration to investigate authorities that support the Sinaloa drug cartel.
Otherwise, there will be another car bomb placed in Juárez to kill federal police, the threat stated.
"If in 15 days, there is no response with detention of corrupt federales, we will put a car with 100 kilos of C4," the message read.
Composite 4, or C-4, was the plastic explosive used for an attack that killed three people Thursday in Downtown Juárez, according to military officials in Juárez.
FBI officials in El Paso said they will not investigate the nature of the message because it is in a foreign country.
"We only offer assistance when requested by that government," said Andrea Simmons, spokeswoman for the FBI.
DEA officials also said they only assist Mexican authorities when these ask for support.
Mexican federal police said they do not regard it as a credible threat.
"We don't give importance to those messages," said José Ramón Salinas, spokesman for the federal police.
A similar message, known as "narco-pinta," was found signed by the Juárez cartel warning they had more car bombs targeted to authorities helping Joaquín "Chapo" Guzmán, leader of the Sinaloa drug cartel.
Military officials in Juárez said 10 kilos of explosive rigged in a car were detonated from a cell phone that day.
It was the first attack of its kind since the Mexican government began cracking down on drug cartels
US official: Mexican car bomb likely used Tovex
by ALICIA A. CALDWELL
A drug gang that carried out the first successful car bombing against Mexican security forces likely used an industrial explosive that organized crime gangs in the past have stolen from private companies, a U.S. official said Monday.
The assailants apparently used Tovex, a water gel explosive commonly used as a replacement for dynamite in mining and other industrial activities, said the U.S. official, who is familiar with the investigation but spoke on condition of anonymity because the official was not authorized to discuss the Mexican-led investigation.
The U.S. official had no other details on how the bomb was constructed, and Mexican officials declined to comment.
The car bomb killed three people — including a federal police officer — Thursday in the border city of Ciudad Juarez, and introduced a new threat in Mexico's drug war. Mexican authorities say the assailants lured police and paramedics to the scene through an elaborate ruse seemingly taken out of an Al-Qaida playbook.
A street gang tied to the Juarez cartel dressed a bound, wounded man in a police uniform, then called in a false report of an officer shot at an intersection. They waited until the authorities were in place to detonate the bomb.
U.S. State Department spokesman P.J. Crowley said the car bomb "may represent a different tactic."
"Unfortunately, these drug cartels, they have an enormous amount of resources at their disposal. They can buy any kind of capability they want. But we are determined, working with Mexico, to do everything in our power to reduce this violence that affects not only the Mexican people, but our own," Crowley told a news conference Monday.