Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Ten Killed at Mexican Drug Rehab Center VOA News 25 October 2010 Members of the Mexican Federal Police stand guard in front of a rehab center in Tijuana, where the shootings occured, 25 October 2010 Photo: AFP Members of the Mexican Federal Police stand guard in front of a rehab center in Tijuana, where the shootings occured, 25 October 2010 Mexican police say gunmen have shot and killed at least 10 recovering addicts at a drug rehabilitation center. The killings happened late Sunday in Tijuana, near the U.S. border. The motive for the attack was not immediately clear. Mexican security forces have been engaged in a brutal struggle against the country's violent drug cartels since President Felipe Calderon took office in 2006. Nearly 30,000 people have been killed since the campaign began. Last week, Mexican security forces seized 105 tons of marijuana in Tijuana, the largest Mexican drug bust in recent years. Some information for this report was provided by AP and AFP. .