engine - 3:46 pm on Nov 30, 2012 (gmt 0)
Facebook and Zynga have amended an agreement that gave the games developer strong access to the social network's one billion users.
Zynga is the developer behind Farmville, a game once mostly played on Facebook, which at its peak attracted 82 million players a month.
Zynga now has its own games platform, but players will no longer be able to share their progress on Facebook.
Zynga's share price fell by 13% in after-hours trading following the news.Facebook and Zynga Move To End Close Relationship [bbc.co.uk]