Six killed, including four children, in Houston-area shooting

HOUSTON (Reuters) - A gunman shot six people to death, four of them children, in a Houston suburb on Wednesday, then surrendered to police after a lengthy standoff in a mass slaying that authorities say was sparked by a domestic dispute, a constable said.

The victims ranged from 4 to 40 years of age, and preliminary information indicated two of the dead were children adopted by the gunman and his estranged wife, Harris County Constable Ron Hickman told reporters after the suspect's arrest.