Updated on April 3, 2021 at 11:26 am Oakley police are investigating after two children were struck by a vehicle Friday afternoon, requiring one to be flown to the hospital by helicopter, the East Contra Costa Fire Protection District said. The accident was reported shortly after 4 p.m. on Portsmouth Street in Oakley, where police and fire units located the injured children and requested medical units. Download our mobile app for iOS or Android to get the latest breaking news and local stories. A landing spot was set up at Nunn-Wilson Family Park, where a 4-year-old girl with a head injury was taken by helicopter to UCSF Benioff Children's Hospital - Oakland.