The deadly violence continues to grow in Mexico, and Americans are not immune to it. Mexican authorities say four U.S. citizens were killed in separate attacks over the past few days.
All of the murders happened in Ciudad Juarez, across the border from El Paso, Texas. Last Friday, a woman was killed inside a tortilla shop. On Saturday a woman and a teenager were shot to death on a bridge leading to El Paso. And on Sunday a man was killed outside of a house.
It's not clear what the motive for the shootings was, but virtually all of the violence in Mexico is drug related.
Ciudad Juarez has become one of the deadliest places in the world as rival drug cartels battle for turf. More than 2,000 people have been killed in the city so far this year.
But the violence is spreading away from the border cities and creeping into resort towns. Thirteen people were murdered in Acapulco on Sunday and Monday. That includes three police officers who were killed in a drive-by shooting early Monday as they patrolled the upscale tourist district.
Things have gotten so bad, Acapulco's mayor has warned people to stay indoors after dark.