The D.C. police department is investigating a woman's allegation that a police officer "engaged her in sexual activity" after stopping her to issue a ticket for a traffic violation, according to a statement released by the police department yesterday.

It said the officer, a 12-year veteran of the force, "has been placed in a noncontact status with his police powers revoked" while the allegation is investigated by the department's internal affairs and criminal investigations divisions.

The statment did not release the officer's name. A police source said he is assigned to the police department's 4th District.

The woman, a 23-year-old from Rockville, was driving on Park Road NW about 8:10 p.m. Wednesday night when she was pulled over for speeding, according to the woman's husband, who did not want to be quoted by name. He said his wife, who was not carrying her license, has alleged to police that an officer stopped her and ordered her to follow him in her car to a nearby area, where he sexually assaulted her.

Police sources said that the department is investigating the possibility that an officer "made some arrangements for sexual favors" in exchange for not citing the woman with a traffic violation.

Police sources said that early yesterday an officer was interviewed by the internal affairs division in connection with the allegations.

A police source said the results of the department's investigation will be presented to a grand jury.