Attorney General Arely Gómez reported on the arrests done during the investigations
The body was cut and the skin of his face was peeled.
The gunman wrote the letters "RB" and other markings, but the meaning was unclear.
The investigation will be centered on the environment authorities of Mexico City.
Five were found in an empty field, while the other was located at a ranch in Gutiérrez Zamora.
The Clinton campaign says the FBI interviewed Clinton in Washington, about her emails while she was secretary of state.
The Clinton campaign says the FBI interviewed Clinton in Washington, about her emails while she was secretary of state.
On June 10, five vehicles carrying 34 Central American migrants were apprehended while traveling together between the northern Mexican states of Zacatecas and Coahuila.
The two escapees broke windows and bars with hammers, causing a big noise that should have been heard by the authorities.
It is suspected that the murders are related to fights among drug dealers.