Boise Police say at least 11 people have been injured after a auto went into a crowd at the Boise Spectrum, a complex of movie theaters, shops and restaurants.
Boise Police say a driver leaving the auto demonstrate parking garage collided with a few people who were on the walkway.
Graphic video of the incident shot by a witness shows a gray Porsche spinning sideways before its strikes the pedestrians.
The driver, who is cooperating with police, has not been identified.
"We do not have any information that this was an intentional act", Lebar said. Six of those injured were transported to the hospital via ambulance and two went to the hospital in a private vehicle.
According to police, the driver was moving at "high speed" and lost control of the vehicle, left the pavement and onto the lawn, where the audience was standing.
Eastbound Overland Road was closed from Entertainment Way to Cole Road as a crash reconstruction team investigated Saturday afternoon. "And after that it was sheer screaming".
"The investigation is ongoing, once it's complete the investigation will be forwarded to the prosecutor for possible charges", the Boise Police Department Twitter post says.
Lt. Lebar said "excessive acceleration" is to blame for what happened.
This was the last Cars and Coffee show of the season, according to the event's Facebook page.