Mexican authorities say five guards have been detained on suspicion of complicity in the armed robbery of 157 million pesos from a cash transporting company in southern Mexico.
Oaxaca state Attorney General Manuel de Jesus Lopez says the guards gave contradictory statements about the heist of cash worth about $13 million.
Jesus Lopez also said Tuesday that the robbery early Sunday wasn't reported to police until four hours after it happened. He says that suggests an inside job.
Initial reports said six gunmen wearing masks and latex gloves broke into Cometra offices early Sunday, overpowred the guards and made off with the money. Officials said the robbers appeared to be wearing uniforms of Cometra workers.