The head of the federal prosecutors' office in the state said another girl was grazed by a bullet and a woman suffered slight wounds from bullet or glass fragments.
Guadalupe Salinas said today the injuries of the 1-year, 8-month-old girl aren't life-threatening. She is being treated in San Antonio, Texas.
The woman is the mother of one of the girls. The US citizens were apparently visiting relatives in Tamaulipas last week.
