The cause of a Sunday morning accident that killed one and sent another to the hospital still is under investigation.

The single-vehicle accident was reported just after 5 a.m. Sunday, and occurred in the 1200 block of White Marsh Road, according to Suffolk spokeswoman Debbie George.

Preliminary investigation showed that a 1997 Infinity, operated by Keshawn Rodgers, 21, of Suffolk, was traveling south on White Marsh Road when it ran off the road to the left and struck a tree. Rodgers died at the scene. His passenger, Tremaine Johnson, was taken to Sentara Norfolk General Hospital, and was listed in good condition Monday.

Through preliminary investigation, police believe speed may have been a factor in the crash.

Officer W.W. Weatherly is the lead investigator.