Two men on a motorcycle fired on pedestrians near a supermarket in Los Guidos late Saturday, and five persons suffered bullet wounds. Three were seriously hurt, said the Cruz Roja.
No reason was given for the shooting, and the persons on the motorcycle wore masks.
Meanwhile, a family in Limón is mourning the loss of a 12-year-old girl who suffered a bullet wound to the head at her school during a celebration of the end of classes.
The girl, identified by the last name of Sánchez, was in Limoncito de Limón when a gun battle broke out nearby. She was hit with a stray bullet.
Four persons were detained by police and a 40-caliber weapon was confiscated. Two of those detained were in a house, and two were in a car, said the Judicial Investigating Organization.