The Australian Competition and Consumer Commission has refused to confirm if it has received a request from News Limited on whether a possible sale of the Perth Sunday Times would breach competition laws.

The publisher of The West Australian, Seven West Media, has shown interest in buying the Rupert Murdoch-owned Sunday Times.

If Seven West Media is successful in buying the newspaper, it would have a seven day a week dominance in West Australian print media.

News Limited has owned the Sunday Times since 1955.