(La Porte County, IN) - A collision involving a semi-truck happened this afternoon in the Rolling Prairie area, wherein the vehicle, hauling a trailer, collided with a van just after 1 p.m. on U.S. 20 at Oak Knoll Road.

So far, authorities have not provided many specifics, but we do know a medical helicopter was called to the scene and lanes were closed in response.

The crash happened just a short distance from New Prairie Small Animal Clinic. Emily Gardner, who works at the clinic as a veterinary assistant, said she heard the crash and then stepped outside.

“The traffic had stopped, so we walked out and called 911,” she said.

Gardner said the van looked “pretty smashed up” on the driver’s side, while the semi did not appear to have nearly as much damage.

Police are still investigating the accident.