Hand on the arm, but didn't really look like he pulled, looked like Fred felt the hand and dropped, knowing that in his home country he'd get the call.
Additionally, what's with the foul call on Olic on the goal line play? Julio Cesar dropped the catch, Olic was back to back with him. A jump back to back is not a foul. Whistle doesn't blow there, Perisic or whoever it was that the ball dropped to probably buries it, since Julio Cesar would have been well out of position.