Authorities say the police chief of the Mexican border city of Nuevo Laredo is missing.
Tamaulipas state prosecutors say they have opened an investigation into the whereabouts of Roberto Balmori Garza, police chief of the city across the border from Laredo.
Tamaulipas prosecutors said in a statement Monday that state officials in Nuevo Laredo will be in charge of the investigation.
Local media reported that two of Balmori Garza's brothers were found shot dead Sunday inside the trunk of a car in the neighboring state of Nuevo Leon.
Tamaulipas prosecutors' spokesman Ruben Dario said Balmori Garza disappeared over the weekend. He said he couldn't give any other information on the case.