A class-action lawsuit filed this week accuses Zynga, a Facebook partner and social-games maker, of deliberately sharing personal data of Facebook users.

Zynga said it would contest the suit.

The suit, filed in a San Francisco federal court by Nancy Graf of St. Paul, Minn., accuses Zynga of sharing "Facebook data" of its 218 million users. The suit seeks monetary relief for those whose data was wrongly shared, and injunctive relief to prevent "continued privacy abuses," the suit said.

The suit appears to be tied to the Facebook privacy spat of this week, where an article in the The Wall Street Journal accused Facebook of sharing user IDs among its partners and affiliates. Developer LOLapps was caught up in the dispute, which was characterized as overblown by Facebook, and information that was normally shared by browsers. LOLApps later returned to the Facebook fold.

"This appears to be another example of an online company failing the American public with empty promises to respect individual privacy rights," explained Michael Aschenbrener of Edelson McGuire LLC, co-lead attorney for the class action, in a statement.

"We believe that the complaint is without merit and we intend to defend against it vigorously," a Zynga representative said in a statement.

Editor's Note: This story was updated at 6:00 PM with a comment from a Zynga representative.