Houston – A Texas woman was killed by  police after she shot two of her daughters in the street in front of her home.

Christy Sheats, 42, had already killed one of the daughters and had shot the second one as police arrived on the scene late Friday afternoon. 

She poised to shoot again when the police officer opened fire, killing the woman.

Fort Bend Sheriff Troy Nehls told reporters one of the daughters died at the scene of the shooting. 

The second daughter was taken by a Life Flight air ambulance to a trauma center where she was initially listed in critical condition. 

She later died from her gunshot wound. 

The father of the young women, who is also the husband to the shooter, was taken by ambulance to a hospital. He had not been injured in the shooting.

The daughters were identified by the Fort Bend County Sheriff’s Office as Taylor Sheats, 22, and Madison Sheats, 17.

The Fulshear police officer reportedly fired one shot at Christy Sheats. That shot proved to be fatal.

A motive for the shooting was not immediately clear. Nehls told reporters that “It was a family argument that turned into a shooting. But, we’re still trying to put the pieces together.”

“It would be too premature to give you a motive as to why something like this took place,” he told ABC13. “The best we can to pray for the father and husband so he can work through this.”

Neighbors said they were shocked at the shooting.

“Those parents are good. They are hard-working,” a neighbor who wanted to stay anonymous told the local ABC affiliate. “Very good family. I do not know how this happened. So I cannot believe that.”

Sheats had been known locally to be a gun-rights supporter, according to posts on her Facebook page.

“It would be horribly tragic if my ability to protect myself or my family were to be taken away, but that’s exactly what Democrats are determined to do by banning semi-automatic handguns,” she wrote on March 2.