Italian antiterrorist police searching for kidnaped U.S. Brig. Gen. James L. Dozier arrested a suspected Red Brigades strategist and nine other suspected guerrillas in a major operation yesterday, informed judicial sources said.

Giovanni Senzani, 42, whom police link to previous Red Brigades kidnapings, was captured in an East Rome tenement building, the sources said, and at least one woman was arrested there.

Security sources said earlier that those detained in raids on three hide-outs at dawn in the Rome area included key suspects wanted for questioning in the Dec. 17 abduction of Dozier, the highest-ranking American at NATO's base in the northern Italian city of Verona.

The police found ground-to-air missiles, bazookas, rocket-propelled grenades as well as documents.

Senzani, a former Florence University criminology professor, was at the top of Italy's most wanted list for a year. Police say he leads the Rome and Naples cells of the Red Brigades. It is the Venice group that is sought in Dozier's kidnaping.

Senzani had been an adviser to the Justice Ministry, where Judge Giovanni d'Urso was a top official. D'Urso was kidnaped, and Senzani disappeared shortly afterward.

D'Urso was released unharmed after several newspapers published Red Brigades statements and the state closed a maximum-security prison. Officials said they had planned to close the prison anyway.

Meanwhile, investigators confirmed that Dozier's wife, Judith, underwent further questioning but that it had been arranged Friday.