ABC refused to comment Tuesday on reports that the "Alias" character played by popular actor Michael Vartan was being killed off.

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The New York Post quoted an insider saying Vartan's final day on the set was Wednesday.

"Entertainment Tonight" said ABC was keeping any upcoming plotlines in Jennifer Garner's series close to the chest.

At least one Web site organized a fan campaign to try and discourage any kind of move to oust Vartan from "Alias,""ET" said.

The posting at www.mvcampaign.com says: "Many of us feel that if this were to occur, it would be showing the show, the viewers, and Mr. Vartan a huge lack of both respect and loyalty ... So, we have decided to take action and do something to express our feelings to ABC."