DUBLIN -- A single-vehicle traffic fatality took place overnight near the on ramp to northbound Interstate 680, according to the California Highway Patrol.

Officers responded to a 12:20 a.m. report of a convertible in a ditch just north of Bernal Avenue, said Officer James Evans.

A person inside the car was pronounced dead at the scene, Evans said.

Additional information was not immediately available.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.