Storer may sell its California cable-TV systems.

Chronicle Publishing, parent company of the San Francisco Chronicle newspaper, and ML Media Partners, a Merrill Lynch limited partnership, plan to purchase the systems for about $260 million, a Chronicle executive said. The transaction would affect 150,000 of Storer’s 1.5 million subscribers, including customers in Los Angeles, Ventura and Orange counties as well as in Northern California. Miami-based Storer declined to comment, but Chronicle Publishing said a joint announcement will be made within a week.