1-person died and 2-others were seriously injured in a rollover accident thursday afternoon. The fatal accident occurred on a highway-101 off-ramp south of Greenfield. Highway-101 was closed in the area for about an hour following the just-before 5 p.m. wreck. 2-calstar helicopters landed on the highway to air lift the 2-injured people to out-of-county-hospitals. The cause of the single-vehicle accident is under investigation.