Updated

The American Legion is calling for the resignations of Veterans Affairs Secretary Eric Shinseki and two top aides amid an investigation into allegations of corruption and unnecessary deaths at the veterans' hospital in Phoenix.

Legion National Commander Daniel Dellinger accused Shinseki, Under Secretary of Health Robert Petzel and Under Secretary of Benefits Allison Hickey of poor oversight and failed leadership during a news conference Monday in Indianapolis.

The Phoenix facility has been under fire over allegations that up to 40 patients may have died because of delays in care and that the hospital kept a secret list of patients waiting for appointments to hide the treatment delays. Shinseki announced Thursday that three officials there have been placed on leave.

The VA didn't respond to a message seeking comment.