OLD BRIDGE - Authorities say a woman was killed yesterday when her car was rear-ended by a tractor-trailer on Route 9 in Old Bridge.
But it's not yet known what caused the accident, which occurred around 12:30 p.m. in a southbound lane of Route 9 near Old Mill Road.
Acting Middlesex County Prosecutor Andrew Carey says 50-year-old Heidi Bennett, of Freehold, was killed in the crash. But her cause of death has not yet been determined.
Authorities have not released the name of the tractor-trailer driver, who was not injured.
No charges have been filed in the crash.

Anyone with information is asked to call Officer Bulin of the Old Bridge Police Department at (732) 679-5959, or Investigator Temple of the Middlesex County Prosecutor’s Office at (732) 745-3373.