SACRAMENTO, Calif. (AP) — State health officials have fined 12 hospitals $785,000 for mistakes that endangered patients.

The California Department of Public Health announced the fines Thursday for hospitals in Los Angeles, Orange, San Diego, San Francisco, Tulare, Marin, Alameda and Del Norte counties.

Some of the fines involved incidents where patients had objects left inside them after operations and had to undergo additional surgery. Others involved wrongly administered medications. In one case, investigators said a doctor's improper use of a laser device caused or likely caused a patient's death. In another, a doctor removed the wrong kidney from a patient.

The fines ranged from $10,000 to $100,000.

Copyright 2012 The Associated Press.