Police said a 10-year-old boy was killed by his family's dog in central Mexico.
Cuernavaca city Public Safety officer Jose Antonio Lazcano said the pitbull-mastiff mix attacked Diego Arellano after the boy jumped over a wall to get into his house. The boy had apparently forgotten his keys.
His mother called the police, who arrived to find the boy lying next to the dog. She gave police permission to shoot the dog before approaching Diego, but the boy was dead by the time they reached him.
A statement Monday from the Morelos state prosecutor's office said the dog bit the boy in the neck.
Local newspaper El Diario de Morelos said the mother told police the dog had never been aggressive before Saturday's attack.