Authorities are continuing to investigate a series of assaults, thefts, and robberies that have occurred at parties in Lincoln. 

Lincoln police said the incidents, at least one of which was captured on cellphone video, appear to be committed by a group of "uninvited guests." That video shows a girl being hit and kicked multiple times by three black females. 

In the video, others in the group can be heard encouraging and cheering on the assault. That particular incident happened on September 29th, after the Ohio State game.

Police say numerous arrests have been made, as investigators continue to work the cases. Investigators have also been working with local colleges to provide safety tips for students attending or hosting parties. 

Investigators are encouraging anyone with information to call the Lincoln Police Department at 402-441-6000.