A dog owner in Britain is being investigated for manslaughter after her pet mauled to death a 10-year-old boy at an English vacation park.

Police said Sunday the woman has been released but is under investigation for manslaughter and having a dog dangerously out of control. She has not been identified or charged.

The boy was killed Saturday morning by what police said was a "bulldog-type breed." The animal is being held at a kennel while the investigation proceeds.

The incident happened at Tencreek Holiday Park, which is 250 miles (400 kilometers) southwest of London on the coast.

The park said that emergency services were called but the boy was pronounced dead at the scene.