Facebook: there's 'no evidence' third-party apps were impacted by data breach, yet

Following confirmation that at least 50 million Facebook accounts were compromised by hackers last week, the social network claims to have found "no evidence" that the data breach extended to third-party accounts users may have linked to their profiles. 
Over the past few days, there's been some concern that the vulnerability would have a wider-reaching impact than first anticipated. Questions were raised about whether outsiders gained access to any external apps users' had l