The death of 69-year-old man who was riding his bike is under investigation, Boulder County Coroner’s Office said.

The man was riding his bike Monday when he and a vehicle collided near Nelson Road and North 65th Street, the coroner’s office said.

Boulder County Sheriff's Office tweeted Monday that Nelson Road was closed between 63rd and 75th.

The man has been identified as Charles Crenshaw of Niwot, Colo. The cause and manner of death is still under investigation, the coroner’s office said.