Jose Flores, 39, struck and killed while attending family birthday party on 87th Street in Darien, Illinois

A 39-year-old man was hit and killed by a car as he was celebrating his niece's birthday is what police are call a tragic accident in the western suburbs Saturday evening.The victim's entire family, including his three children, were present when he was killed.Police closed 87th Street in suburban Darien for several hours while they collected evidence and determined what happened.Family members of the victim identify him as 39-year-old Jose Flores and say he was at his sister's house for a big family gathering to celebrate his niece's sixth birthday.The driveway is off the busy street, however, and witnesses say Flores was trying to help stop traffic while a truck pulling a trailer full of horses there for the birthday party backed out.The driver of a white Toyota Camry struck Flores, sending him flying. Damage to the driver's side front of the car shows where the vehicle hit Flores.Police say the 85-year-old driver stopped after the collision and they questioned her.Police have not revealed what the driver told them may have caused the crash, however she was not injured and no charges have been filed.