A 78-year-old man riding a bicycle was killed around noon Tuesday after a collision with a white SUV in San Marcos. The crash happened on San Marcos Boulevard near Rancho Santa Fe Road, according to the San Diego Sherriff’s Department. It is unknown what led up to the deadly crash. The driver of the vehicle remained at the scene, according to deputies. All roads near the collision were reopened just before 5 p.m. by the Sheriff’s department. This story uses functionality that may not work in our app. Click here to open the story in your web browser. ...read more read less