A vehicle collision jammed up southbound traffic on Highway 101 in Rohnert Park on Tuesday morning, authorities said.

The 7:30 a.m. crash involved at least two vehicles, one of which apparently struck a fence off the side of the road near the off-ramp to eastbound Rohnert Park Expressway, the CHP said.

At least one person was taken to Santa Rosa Memorial Hospital for treatment of unspecified injuries, emergency dispatchers said.

No additional information was immediately available.