Police say a man dialed 911 to confess to the shotgun slayings of his girlfriend and her three young children at the house they shared.

Jeffrey Hutchinson, 35, was charged with four murder counts after surrendering following the shootings Friday night.Okaloosa County sheriff's spokesman Rick Hord had no explanation for the shooting other than calling it "some sort of domestic situation."

The victims were identified as Renee Flaherty 32, a postal worker in Niceville, and her children, Logan, 4, Amanda, 6, and Jeffrey, 8.

Police said Hutchinson told investigators he had moved into the house with them six or seven months ago.