BOSTON (AP) — Authorities say one of the two men shot as they rode their motorcycles on a Massachusetts highway last weekend has died.

The Suffolk district attorney's office says 32-year-old Scott Stevens Jr., of Taunton, died at the hospital Tuesday after being shot Sunday on the southbound side of Interstate 93 in Boston.

Stevens' 54-year-old father, of Raynham, remains hospitalized.

Police say no arrests have been made but are looking into whether the shooting of the father and son are connected to the killing of a Boston woman on the same day.

Investigators say it does not appear there is any prior connection between the motorcycle operators and the shooter.