Eight dead in Mexico rehab attack TORREON, Mexico, June 4 (UPI) -- Attackers armed with machine guns opened fire at a drug rehabilitation center in northern Mexico, killing eight people and injuring eight others, police said. Torreon police said on Twitter state prosecutors were investigating the Sunday night shootings. The incident was one in a series of attacks in recent years on drug treatment centers in northern Mexico, where there has been increased battles over cartel territories, CNN reported Monday. In 2010, about 30 armed gunmen shot and killed 19 patients at a treatment facility in Chihuahua. Another 17 died in 2009 during an attack on a facility in Ciudad Juarez. More than 47,500 people have died in Mexico since President Felipe Calderon announced his crackdown on drug cartels in December 2006, government statistics indicate.