(CNN)A woman in Texas gunned down her two daughters -- killing both of them -- before a responding police officer killed the mother, authorities said.
Texas woman shoots, kills 2 daughters
Christy Sheats, 42, fatally shot daughters Taylor, 22, and Madison, 17, on Friday in Fulshear, west of Houston, according to the Fort Bend County Sheriff's Office.
After someone called 911, a Fulshear police officer shot the mother when she refused to put down her weapon, the sheriff's office said.
The daughters were found on the street with gunshot wounds. The older daughter died at the scene; the younger one at a hospital.
Deputies had previously told CNN that the older daughter was 19 but later corrected the age to 22.
The motive for the shooting, which began inside the family home Friday and spilled out into the street, is under investigation.
The woman's husband, Jason Sheats, was taken away by paramedics, CNN affiliate KTRK reported.
Sheriff Troy Nehls said deputies had gone to the family's home in the past, but he declined to provide additional details.
"It would be too premature to give you a motive as to why something like this took place," Nehls told the affiliate. "The best we can do is pray for the father and husband so he can work through this."