Police in Texas say a man shot and wounded his estranged girlfriend and then killed her mother and her son before killing himself in a home in a Fort Worth suburb.

Police say the shooter was found dead of a gunshot wound inside a home in North Richland Hills on Tuesday night.

They say his 37-year-old former girlfriend, Tamara Jones, is in critical condition. Her 55-year-old mother, Kristin Jones, and her 17-year-old son, Tyler Heiliger, were killed. Tamara Jones' 18-month-old son was not injured.

Police say neighbors called 911 after hearing shots and found one of the women in the driveway.

Lt. Billy Privett says no motive for the shooting has been established.