Mexican officials say a convoy of gunmen chasing a rival killed three people, including two children, after opening fire on a home in the resort city of Acapulco.
Officials in Guerrero state say the gunmen began shooting at the house Tuesday after the man they were pursuing attempted to hide in it.
A 60-year-old woman was killed along with two children, ages 6 and 2. A 23-year-old woman was wounded in the shooting.
It was not clear what happened to the man being chased.
In another attack in Acapulco, a 15-year-old boy was killed along with two other men.
More than 34,000 people have been killed in drug-related violence in Mexico since President Felipe Calderon launched a military crackdown on drug cartels in 2006.