Updated 3:30 p.m., Monday.
A woman was struck and killed around 5:50 a.m. on Lee Burbank Highway by a motorist who then drove away, the Suffolk County District Attorney's office reports.
Jon Ravida, 47, of East Boston, was arrested by Revere and State Police today, according to the DA's office.
Evidence shows Sothany Pen, 22, was crossing the road east to west when hit by Ravida's Ford Explorer, the DA's office says, adding she was declared dead at Mass. General.