Bradley University in Peoria says a group of teenagers appears to be responsible for several confrontations with, and assaults on students.

According to reports, the university said at least five such incidents happened Monday night on and near campus. None of them resulted in serious injuries.

The university said the incidents involved a group of four to five teen boys. In one incident they surrounded a pair of female students while threatening and grabbing them. In another, they threw a girl to the ground and stole her cellphone.

Witnesses said the teens appeared to be between 13 and 16 years old.