The California Highway Patrol identified the wrong-way driver who collided head-on with another car down the street from a wedding, officials said.
A vehicle driving southbound in the northbound lanes of Deer Springs Road collided with another car around 10:30 p.m. Sunday.
In all, three people were sent to Palomar Hospital with what was described as major injuries.
Injuries could have been much worse if not for seatbelts and airbags, said City of San Marcos Battalion Chief Bill Frederick.
It appeared some of the injured may have been involved in a wedding taking place nearby but Frederick could not confirm that information.
California Highway Patrol officers said Monday the driver of the Camaro would be charged with felony driving under the influence once he is released from the hospital.
Ryan John Mills, 25, of Ashbourne County, Meath, Ireland, suffered a serious leg injury in the crash.
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Mills, who was in San Diego County on a temporary work visa, lists a police department in Ireland as his place of employment.
CHP could not confirm if either driver had left a nearby wedding just before the crash.
