4-year-old boy accidentally shoots, kills 2-year-old cousin; grandfather arrested: Authorities The shooting was an accident, according to the sheriff's office.

A 4-year-old boy shot and killed his 2-year-old cousin at a home in Muscoy, California, according to local authorities.

Deputies responded to a report of a shooting at the home Friday morning. The victim, a 2-year-old girl, was found suffering from a gunshot wound and was taken to a local hospital where she was pronounced dead, the sheriff's office said.

An investigation determined the shooting to be accidental but also revealed Lopez had left the gun "in an where it was accessible to the children," the sheriff's office said in a statement.

It was unclear Friday evening whether Lopez has an attorney.