A driver who lost consciousness because of a medical condition went up onto a sidewalk on East Alameda Avenue Thursday and struck and killed a pedestrian in a motorized wheelchair, Aurora police said.

Neither the deceased nor the driver, who was treated for minor injuries, were identified by police following the incident, which occurred at about 3:40 p.m.

The department’s preliminary investigation showed the driver of a Chrysler 300 was headed east when it hit the person in the wheelchair. Officials said the car continued east on the sidewalk until it struck a power pole. This forced the Chrysler back onto Alameda. where it collided with another car, causing minor damage to that vehicle.

The police said drugs, alcohol or speed did not appear to be factors in this crash.

East Alameda was closed between South Lansing Street and South Moline Street for approximately four hours during the investigation.