Boston police have arrested a retired Cambridge cop in connection with this morning’s pre-dawn hit-and-run accident in the area of Symphony Hall.

Lawrence Stead, 69, is expected to be arraigned tomorrow in Boston Municipal Court on a charge of leaving the scene of a motor vehicle accident causing personal injury.

The alleged victim, who police said is an adult male, was hospitalized at Boston Medical Center with life-threatening injuries. His identity has not been released. He remains in critical condition, said Jake Wark, spokesman for Suffolk District Attorney Daniel Conley.

Cambridge police spokesman Jeremy Warnick said Stead retired in 2009 with the rank of officer.

Boston police said the victim was struck about 6 a.m. outside an MBTA station on Massachusetts Avenue and that the driver of a gray Mercury Marquis sedan driven by a man “fled the scene.” The car was recovered by Quincy police a short time later at an apartment complex on Cove Avenue, where public records show Stead lives.