A Herndon man, brandishing a sawed-off shotgun, was shot in the back as he was attempting to abduct a 2 1/2-year-old child from her Loudoun County home Saturday afternoon, Loudoun County police said.

Lonnie Branham, 25, is in fair condition at Fairfax Hospital after being shot about 1:15 p.m. with a 22 Magnum rifle by 66-year-old Alfred Robinson, police said. Branham was walking through a field about 100 yards from the child's home when he was shot, police reported.

Officials said that Branham, apparently looking for his ex-girl friend, Martha Corum, kicked the door down on a house on Rte. 638 about four miles outside of Sterling Park rented by Gilbert Johnson, a junk dealer.

Corum was not at home at the time, but Mrs. Johnson, Alfred Robinson, who lives at the same house, and three children, including the abducted daughter of Corum were at home, a police investigator said.

Police said Branham searched the house for Corum while Robinson left the house and hid. He then shot Branham as he carried Corum's child from the house.

No charges have been filed at this time against Robinson, who is retired, police said.