A 27-year-old man died after his vehicle went off the road and landed on its roof yesterday in Butler County.

William R. Fisher III, of Grove City, was traveling east along Branchton Road in Washington Township when he failed to negotiate a curve. His vehicle went off the roadway, struck a tree, and then rolled onto its roof. Mr. Fisher, who was not wearing a seat belt, was ejected.

The exact time of the crash is not known, according to state police.

State police are investigating.