By MARY CALLAHAN

THE PRESS DEMOCRAT

A single vehicle crash was blocking two lanes of northbound Highway 101 in Petaluma on Friday morning, the CHP said.

Initial reports indicated a van had struck the center median and overturned across two lanes at East Washington Street, the CHP said.

A pickup truck also may have collided with the van and was overturned on its side, the CHP said.

No additional details were available.