The Mexican border city of Ciudad Juarez has been hit by a series of shootings.
Battles between rival drug gangs have made the city across the border from El Paso, Texas, one of the world's deadliest.
Prosecutors say gunmen stormed into a bar early Wednesday and dragged eight people out to the parking lot where they were shot to death.
Hours later, a car chase ended in a shootout in front of an elementary school. A woman and two men were found dead inside one of the cars. A teacher at the school says three students and a pregnant teacher suffered panic attacks and were taken to a hospital.
Elsewhere, gunmen opened fire on another car, killing four young men. And in a separate attack, a gang shot to death a man in a wheelchair on the sidewalk.
More than 800 people have been killed this year in the city of 1.3 million people.