Which scholars deny hadith being mutawātir?

According to the muhaddith scholar Ibn Hibban (270 - 354 hijri), all khabar are as its best *ahad*: > وأنكر الحافظ ابن حبان في صدر صحيحه الخبر المتواتر ، فقال : وأما الأخبار فإنها كلها أخبار آحاد > > ... He said: Regarding the akhbar, all of them are ahad. > > Source **Question:** Which scholars denied ahadith being mutawatir? *I also heard that some scholars claim only one hadith is mutawwatir (while others like Nawawi, say even that one might not be): "man kaddaba aliya ...." (i'll try to add references about this later)*