A Veterans Affairs hospital official says investigators have discovered 11 significant errors and three deaths in more than 30,000 cases originally seen by a pathologist officials say was working while impaired at the VA hospital in Fayetteville, Ark.

Veterans Health Care System of the Ozarks spokeswoman Wanda Shull said Monday the families of the deceased veterans have been notified. Previously, investigators said one death was potentially the fault of Dr. Robert Morris Levy, who has denied working while impaired.

Eleven errors merited institutional disclosure, meaning mistakes in patient care that could or did result in "death or serious injury." Officials have discovered 1,119 total errors, but not all resulted in change to clinical care.

Pathologists have now reviewed 14,980 cases, just under half of the total cases dating back to 2005.