The vehicle fires were determined to be suspicious, said sheriff's Sgt. David Gilmore.
Multiple callers reported two empty vehicles on fire in the 700 block of East Elder in Fallbrook around 4 a.m. Sunday, Gilmore said.
Both cars were fully engulfed in flames when deputies arrived on the scene, and a bomb arson detective was called, he said. No one was injured in the incident.
Information about the cars' makes or owners was not released by the department.
Waterfront Park in downtown San Diego played host to thousands of people demonstrating in the third annual Women's March, which also took place in dozens of other cities across the country.
Three people robbed a San Carlos jewelry store on Saturday afternoon, then fled before officers were able to arrive, police said.
A record number of County employees will be hitting the streets next week to help count homeless people in the region.
People choosing not to vaccinate are now a "global health threat," according to the World Health Organization.
As the state’s affordable housing crisis worsens, the City of Encinitas has launched a bold new initiative to encourage its homeowners to do their part.