Three major crashes in Sonoma County at almost the same time early Monday afternoon had emergency crews rushing to northern Petaluma, Glen Ellen and Schellville, according to the CHP.

On Highway 101, south of Petaluma Boulevard North, an SUV ran off of the highway and overturned.

The 12:57 p.m. crash and emergency response blocked traffic for about an hour.

At least one person was transported by ambulance.

At 1:01 p.m., a rollover crash was reported on Warm Springs Road at Sonoma Mountain Road above Glen Ellen.

Initial reports indicated the wreck was blocking the northbound lane and that at least one person was taken to a hospital by ambulance.

And at 1:17 p.m., callers reported a head-on crash on Arnold Drive at East Bonness Road near Schellville in eastern Sonoma County.

Initial reports indicated no major injuries were involved, but crash debris was slowing traffic.