From the Associated Press:

 SPRING, Texas (AP) - Authorities say it appears "a domestic issue with a breakup in the family" led to a man in suburban Houston shooting his five children and two others.
Four of the children and two adults were killed in the shooting in Spring, Texas.
A 15-year-old daughter was able to call 911 and warn authorities that her father was on his way to kill her grandparents.
The father surrendered following a three-hour standoff in a car.
The teen girl is said to be "very critical." The man's wife is estranged and was out of state at the time.

Photo Credit: Carl Ballou Shutterstock