Tokio Hotel’s manager & producer David Jost confirmed the incidents with BILD (German press media) and states:
“One of those masked stalker girls physically assaulted a family member of Bill and Tom on April 8th. We filed charges against the stalkers immediately the next day and now we are about to file additional charges, as well as request a restraining order. This way those stalkers won't be allowed to get anywhere close to the band's family members anymore. These veiled women are not fans but crazy and militant stalkers.
This does not have anything to do with real fandom. Neither Tom or any other band member would ever hit one of their fans.
Tokio Hotel's band members can totally handle stalkers but things become problematic when their family members are being harassed, threatened and physically attacked. From the start of their career all four band members, especially Bill and Tom, tried to keep their family out of the spotlight but unfortunately, it did and does not work all the time."
You can watch here on YouTube
a feature broadcast on German TV regarding the incidents.