CARLSBAD–A vehicle collision Saturday seriously injured a motorcyclist and his passenger, according to traffic authorities.

The motorcycle rider was identified as a 41-year-old male from San Diego. The female passenger was identified as a 35-year-old female, also from San Diego.  The driver of the other vehicle was identified as a 33-year-old male from Carlsbad.

Carlsbad police officers responded to area of Carlsbad Boulevard and Cerezo Drive regarding a report of a serious injury collision. Upon arrival, officers found that a motorcycle occupied by a male rider and a female passenger had gone down in the roadway and had collided with a vehicle.

Paramedics treated both the male and the female motorcyclists. The man was flown by helicopter to an area hospital for life threatening injuries. The female passenger was also transported to an area hospital for treatment of moderate injuries. The occupants of the other vehicle were uninjured.

The preliminary investigation suggests that the driver of the vehicle was attempting to make a U-turn and did not see the motorcycle approaching. The motorcycle rider lost control and laid it down, causing himself and his passenger to be ejected. The driver of the other vehicle remained at the scene. Alcohol or drugs do not appear to be a factor in the collision.

Traffic officers responded to the scene to conduct a full investigation.