A newborn boy was abducted from his screaming mother after she was repeatedly shot outside a Texas medical center Tuesday, and the suspected shooter sped off with the infant in a blood-stained Lexus, investigators said.

Montgomery County sheriff's officials said the mother, 28-year-old Kayla Marie Golden, was killed.

Golden was walking to her truck after a checkup with her 3-day-old son, Keegan, when she had an argument with a woman parked next to her, sheriff's Lt. Dan Norris said.

Witnesses said the woman repeatedly shot Golden, took her infant and sped away, hitting the dying mother as she screamed ``My baby!'' and tried to reach into the Lexus, Norris said. They reported hearing as many as seven gunshots and said a man also was in the car, which was blood-stained on the driver's side, Norris said.

Joshua Jesson said he was in the clinic with his girlfriend when he heard gunshots. He said he saw the Lexus next to the truck, then later looked back and saw the car was gone and a woman was lying there.

``I thought she just passed out. Then somebody ran in here and said, `Somebody got shot,''' he said. (AP)