Sudden acceleration when entering an open parking space, causing the car to hit two vehicles and causing extensive damage to my and the other vehicles. Safety of others would have been at risk as the accelerations was unintended and unexpected and if people were present they would have been in danger. The vehicle is currently at dealership for examination of unintended acceleration and accident. No warning of sudden acceleration nor any issue with car prior to accident. Air bags were not activated. Police contacted but since noninjury no report filed.