Police are on the lookout for interstate 69 protesters they say vandalized an Evansville business. Vanderburgh County Sheriff Deputies were on the scene just after three Tuesday afternoon at 6200 Vogel road, dusting for fingerprints. Witnesses say at least 10 protesters wearing bandannas over their faces showed up at Bernardin-Lockmueller engineering company. They say - the protesters banged on the companys windows, breaking one, then left a pamphlet against I-69 construction. A witness was able to snap pictures of them getting into a black Saturn and a green Saab. Vanderburgh Co. Sheriff Detective Jason Ashworth says the protesters stunts are getting more dangerous. The protesters also sent more than a hundred dollars worth of unpaid pizza to the business. Bernardin-Lockmueller is an engineering company working on the i-69 project. Witnesses say the protesters looked to be in their teens to early twenties...some of them white males. Anyone with information is asked to call the sheriffs department.