A man was struck and killed early Tuesday morning by a vehicle on I-684 in North Salem.

State police say the crash happened around 2 a.m. on the southbound side near mile marker 24.3.

Investigators say the man was walking in the left lane when he was hit by a southbound vehicle. It is unknown at this time why the man was walking on the highway.

Anyone who witnessed the crash is asked to contact the New York State Police Somers Bureau of Criminal Investigation at (914) 742-6057.