Former Fairfax City treasurer Frances L. Cox, under indictment for embezzling funds when she was in office, was arrested last weekend and charged with drunken driving, Fairfax City police said.

Cox was arrested at 12:43 a.m. Sunday in Fairfax City and charged with driving while under the influence of alcohol and refusing to take a breath or a blood test, police said. Police said she spent less than an hour at the Fairfax City police station before she was released to her attorney, Northern Virginia Del. John H. Rust Jr.

Rust said last night that Cox would plead not guilty in Fairfax City General District Court on Aug. 19. Cox said yesterday that she was not drunk when she was arrested. "The arrest has to do with harassment," she said. Alluding to the felony embezzlement charges against her, she said it was "obvious" she was arrested because of "other circumstances."

"If you know who I am you know what the other circumstances are," she said.

Cox, who was defeated for reelection as city treasurer and left the post in January after 27 years, faces trial Sept. 13 in Fairfax County Circuit Court. The indictment last month came after repeated reports of tangled finances in the city treasurer's office.