Director of state investigation agency among those killed in Chihuahua in operation to destroy clandestine drug labsTwo United States officials and another two Mexican officials assigned to combat drug cartel operations died in a car accident in the northern Mexican state of Chihuahua on Sunday, a U S embassy spokesperson said.The Mexican officials were the director of the state’s investigation agency and an officer, state authorities said, adding that they were on an operation to destroy clandestine laboratories in the municipality of Morelos.Guardian staff contributed Continue reading... ...read more read less