Authorities believe Emily Long killed her husband and their two young children before shooting herself on Monday evening. A third child, a toddler, was unharmed.

The couple's three-year-old — the only survivor of the tragedy — was found safe inside the house and has since been placed in the care of relatives.

A toddler was found unharmed at the home in Madbury late Monday night when the bodies were discovered, officials said.

DEVASTATING pictures have emerged of the parents and two kids who were shot to death in an apparent murder-suicide. The four family members were found dead in their New Hampshire home on Monday