The drug wars in Mexico have sunk to a new low.

Yesterday, a gang of hooded gunmen shot eight patients to death and wounded six others at a rehab center in Ciudad Juárez in what looks like part of a drug-gang feud in the cartel-ridden city. The gunmen reportedly stormed the center (during a Wednesday night prayer service, no less), then picked out their victims and took them to the back patio to be shot. The gunmen then opened fire inside the rehab center, leaving behind 60 shell casings.

FILE: ALFREDO ESTRELLA/AFP/Getty Images

These shootings bring the city's total of drug-related killings to a whopping 40 -- for just this week. A major drug transit point, the border city has always run rampant with cartels and crime. But the recent outbreak of murders and kidnappings is something new. So far this year, Ciudad Juárez's murder toll sits just below 800, most of them drug-related.

Things don't look too good for Felipe Calderon, who vowed to crack down on Mexico's drug traffickers at the beginning of his term. This year's wave of violence might just be a reaction to his stepped-up efforts to combat crime, but the Mexican president has some house-cleaning to do. Just today, six members of the government's top organized crime unit were arrested for supposedly leaking information to drug traffickers.

With Mexico still awaiting some $400 million in U.S. drug-war aid, Calderon better step up his efforts to kick out the bad guys soon.