The link is in German. This is a summary:According to the chief of security of the Disco Club "Elephant Club" up to 500 men at multiple occasions tried to violently storm the club.
Women were touched in the genital area. "Only by applying physical force could we help the women free themselves", the c.o.s. said.
Bielefeld police confirmed that multiple women filed criminal complaints.
The police also confirmed that at multiple occasions police assistance was rendered to help defend the premises of the club.
The level of aggression shown by the attackers was unforseeably severe. The police intends to adapt tactics to the new situation.
The picture in the linked article shows the attackers in front of the club on nye.