Trump insists 'Mexico will pay' for border wall
The attack took place in the early morning on the edge of the city of Culiacan in the home state of the Sinaloa Cartel, whose former leader Joaquin "El Chapo" Guzman was recaptured in January.
"It seems that it was an ambush, we think it was an attack by the local cartel," an official at the prosecutor's office said.
Thousands march in Mexico for 43 missing students
Guzman is currently in prison in Ciudad Juarez, a northern city on the US border, awaiting extradition to the United States.
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