PRINCE GEORGE COUNTY, Va. -- The father of one-year-old twin girls was charged with two counts of felony child endangerment and indecent exposure after police found his babies alone in a car parked in a driveway, with the windows down, outside a Prince George County duplex.

The father, 27-year-old Juan Munford, was about 30 feet away from the car. He was having sex with a woman behind the building, police said.

"We went around to the back of the duplex and discovered a male and a female engaging in sexual intercourse," Prince George Police Capt. Brian Kei said. "At that point they [police] made contact with the individual who identified himself as the father of the two twins."

Police charged the woman with incident exposure. She was released on scene.

The children were taken to Southside Regional Medical Center as a precaution and placed in the custody of child protective services.

Neighbors along the 7900 block of Bull Hill Rd. called police after hearing the children's cries Friday morning.

"Not only your own kids, but look out for any kid in the neighborhood," Capt. Kei said.

Munford will spend the weekend in jail before an initial court hearing next week.