Asked directly whether he was involved in any of the briefings against colleagues revealed in Damian McBride's forthcoming memoir, Ed Miliband said it is "not my style of politics".
He said that anyone who knows him would agree that he has "never engaged in the factionalism, never engaged in the briefing".
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The 21-year-old, who was arrested on Sunday, also allegedly injured two other people in the attack in the German city of Reutlingen.
She was going to the aid of a family member who got out of the car in the middle of the park and was dragged away by a different tiger.