A Tamaulipas state government statement says seven of those killed yesterday in the city across from Brownsville, Texas, were presumed criminals.
The girl was a bystander at a shopping mall with her family during one of the shootings. The statement said she was struck by a bullet fired by one of the suspects.
The violence began in the afternoon with a traffic stop in which the occupants of an SUV with Texas license plates allegedly opened fire on authorities. Three suspects were killed.