As her two young children watched, a 25-year-old Woodbridge woman was attacked by two teenage girls who grabbed her by the hair and smashed her head repeatedly into the sidewalk after she complained that their car was blocking the street, police said yesterday.

Natalie Giles Davis had been on her way to a church function with her children, her aunt and other relatives when she was attacked Tuesday evening. She remained in critical condition last night at Inova Fairfax Hospital, in a coma and on life support. Prince William County police charged Teresa Hattie Dixon, 18, of the Alexandria area of Fairfax County, and a 16-year-old Woodbridge girl with aggravated malicious wounding.

Davis lives with her husband and her children, a 4-year-old girl and 2-year-old boy, on Bentley Circle in the Rollingwood Village town house community. Her group was driving out of the circle in her aunt's Chevrolet Caprice about 7:15 p.m. when they noticed a Geo Prizm blocking their way to the intersection with Rollingwood Drive.

Police said that as her aunt tried to maneuver around the parked car, Davis got into an angry exchange of words with several teenage girls in and around the Geo and then got out of her aunt's car.

"The 16-year-old grabbed the victim by her hair and pounded her head onto the sidewalk several times," police spokeswoman Kim Chinn said. "The 18-year-old stomped her on the head and then kicked her on the side of the head. Then they left her there, bleeding on the sidewalk."

A group of children heard the aunt screaming and summoned a police officer who was speaking to a group in the neighborhood. The officer arrested Dixon and the 16-year-old outside a house on Bentley Circle where the girls had been going to visit a friend, according to neighbors. Three other teenage girls at the scene -- two of whom were inside the Geo -- were not charged.

Both suspects were held without bond yesterday. Police did not identify the 16-year-old because she is a juvenile.

Davis's cousin, Natasha Rice, 28, said Davis had left home minutes before the incident, piling into her aunt's car with two nieces, a nephew and her own children, Symphony, 4, and Dajour, 2.

"She got out of the car to find out what was going on, and the other girls were yelling obscenities," said Rice, who was baby-sitting for Davis's children at their shared town house yesterday afternoon while Davis's husband visited the hospital. "That's when they said everything happened really fast. I don't understand it, because none of us even knew any of those girls."

Davis was taken by ambulance to Potomac Hospital and then was flown to Inova Fairfax, where she was admitted to the intensive care unit. Rice said doctors operated on Davis's skull to ease pressure on her brain. "We're just hoping she can get through this," Rice said.

During a brief period of consciousness, Davis was unable to recognize her husband, Rice said, adding that Davis's two children were "shocked and upset" by the beating but that they most likely "don't understand it entirely."

Chinn said police are unsure who instigated the fight Tuesday evening, but she said it remains unusual for such a violent beating to be committed by girls. Still, she said, police have been seeing a gradual rise in such incidents.

"It's not common for girls to beat up girls," Chinn said. "We don't usually see girls involved in violent crimes, but it is happening more."

Staff writer Christina A. Samuels contributed to this report.

CAPTION: Teresa Hattie Dixon, 18, was charged in the beating along with a 16-year-old. Both were being held without bond yesterday.