State Police are investigating the death of a 21-year-old man who was struck and killed by a vehicle early Sunday while walking on La. 935 west of La. 431 in Ascension Parish, a State Police spokesman said.

Lawrence A. Rowell, of Gonzales, was pronounced dead by the Ascension Parish Coroner’s Office after he was struck by a 2005 Ford pickup truck driven by Dustin Villnerve, 34, of St. Amant, around 4 a.m., Trooper 1st Class Jared Sandifer said.

Roswell was likely walking in the westbound lane of La. 935 when the accident occurred, Sandifer said. Villnerve stopped right away and was not cited.

Rowell may have been impaired and State Police submitted a toxicology sample to the State Crime Lab, Sandifer said.