Placer County sheriff's officials told the Sacramento Bee that Barbara, 86, Lopes and Teresa Olesniewicz, 73, - residents of Gold Age Villa, an elderly care home in Loomis - died after eating the soup that had been prepared by a caregiver at the facility.
The caregiver who prepared the soup was among the six people sickened, said Sheriff's Lt. Mark Reed. The conditions of the four people hospitalized were not immediately known, and their names have not been released.
Reed says after deputies were called to the facility Friday they determined the incident was an accident.
"We got a report that some people had consumed some poisonous mushrooms," Reed told the newspaper. "We responded out to the facility and interviewed people to make sure there was no foul play. There wasn't any...It was an accident" Reed said.
Placer County officials referred questions about the incident to the California Department of Social Services, the agency that licenses senior care facilities. A call to the department by The Associated Press was not immediately returned.
A message left on a recording device at Gold Age Villa was not immediately returned.
(Copyright 2012 by The Associated Press. All Rights Reserved.)