Dartmouth police are investigating a motorcycle crash on June 30 which left a 51-year-old rider dead.

According to police, officers and other emergency personnel responded to a report of a motorcycle crash in the area of 897 Smith Neck Road at 7:05 p.m. The crash involved only a 2004 Honda motorcycle and its rider, Gary Casmira, of Dartmouth.

He was transported to Rhode Island Hospital, where he died a short time later.

The Dartmouth Police Department Crash Reconstruction Unit and Dartmouth Police Department Detective Division are investigating the crash.