The union representing striking writers aimed a blow at the glamorous heart of Hollywood, refusing to allow its members to write for the Academy Awards or Golden Globes ceremonies.

The board of directors of the Writers Guild of America West decided not to give the Academy of Motion Picture Arts and Sciences an interim agreement for writing services, a person close to the guild said Monday.

The person, who was not authorized to comment and spoke on condition of anonymity, declined to say when the decision had been made.