Search crews have slowed their efforts to locate a plane that reportedly crashed in the Santa Cruz Mountains west of San Jose on Saturday.

Around noon that day, the California Highway Patrol (CHP) dispatch received a call about a plane going down in the hills near Stanford campus.

CHP, Calstar and Coast Guard helicopters, as well as search and rescue teams from Santa Clara County, Cal Fire, San Mateo County Fire and the Woodside Fire Protection District, were dispatched that afternoon. They found no trace of the crash site in San Mateo or Santa Cruz counties.

The Federal Aviation Administration received no reports of a missing or delayed plane, and officials said the report may have been an error, according to the San Francisco Chronicle.