BOGOTA, Colombia—Nine people have been shot to death in the countryside outside Medellin in a massacre police suspect is a settling of accounts between drug traffickers. Gen. Yesid Vasquez is commander of the Metropolitan Police Department in Medellin, Colombia's second largest city. He says that the five men and four women were killed on a farm, apparently in the early morning hours of Monday. Vazquez says the slayings following a Sunday afternoon party at the "extremely luxurious" country home, and the farm's owner is among the dead. The general says that the victims were apparently shot with guns that had silencers, explaining why no one nearby reported hearing gunfire. Santiago Londono, secretary of government for Antioquia department says one woman survived the massacre and is being questioned by investigators.