Jersey Shore Stars Claim Self-Defense In Bar Fight

As TMZ first reported, two guys claim they were on the receiving end of an unprovoked attack from Ronnie and Roger and are now planning on suing.

But our sources tell a different story -- claiming the two guys were taunting the cast all night and security at the club even tried to get them to leave. Our sources say the guys refused and proceeded to get into the face of Roger and of a friend of Pauly D's named Ryan Labbes.

Our sources say the two guys then threatened to "knock them out" and that's when someone took a swing at Pauly D and all hell broke loose. We're told Ronnie and Roger (along with Pauly D and The Situation) were simply coming to the aid of their guido friend.