We have reached the point where we can say that American fathers have declared war on their families.

Troy Ryan Bellar, 34, used a high-powered rifle with a scope to shoot his 31-year-old wife, Wendy, when she tried to leave their home, the Polk County Sheriff's Office said in a statement.

Two of the couple's children — 5-month-old Zack and 7-year-old Ryan — also were killed, but a 13-year-old got away, with the father chasing and firing after him, officials said.

When the shooting began, the couple's son, Nathan, ran out of the house and down the street — with his dad chasing him through the garage and firing several shots, authorities said.

Nathan was unhurt and will be placed with family members.

Investigators do not know what led to the shooting, but believe it was preceded by "some kind of domestic disturbance," a statement from the sheriff's office said.

Nathan understands the meaning of catastrophe. He has no future.