BOSTON -- A state trooper and a 26-year-old man were seriously injured when the man's car slammed into a parked state police cruiser in the breakdown lane of Route 24 South in Stoughton early Saturday morning.

According to police, trooper Mark Lombardi, a 14-year-veteran, was sitting in his parked cruiser, filling out paperwork in connection with a previous accident, when a 2005 Acura TL rear-ended his cruiser.

Trooper Lombardi, who suffered serious injuries, was transported to Boston Medical Center.

He was listed in stable condition early Saturday afternoon.

The driver of the Acura, 26-year-old Gregory Puopolo, who also suffered serious injuries, was taken to Good Samaritan Hospital in Brockton.

The accident, which happened around 2:30 a.m., forced police to close a section of Route 24 South for more than three hours.

The circumstances surrounding the crash are currently under investigation.