WASHINGTON — New complaints about long wait lists and falsified patient appointment reports have surfaced at Veterans Affairs hospitals and clinics across the country, the department’s internal watchdog said Thursday, but he said there’s no proof so far that delays in treatment have caused any patient’s death.

VA Secretary Eric Shinseki said he was “mad as hell” about allegations of severe problems and said he was looking for quick results from a nationwide audit. He rejected calls for him to resign and a senator’s suggestion that he call in the FBI to investigate.

At a sometimes-combative congressional hearing, Richard Griffin, the department’s acting inspector general, said that after an initial review of 17 people who died while awaiting appointments at the Phoenix VA hospital, none of the deaths appeared to have been caused by delays in treatment.

“It’s one thing to be on a waiting list, and it’s another thing to conclude that as a result of being on the waiting list that’s the cause of death, depending on what your illness might have been at the beginning,” Griffin told the Senate Veterans Affairs Committee.

Griffin said his office is working off several lists of patients at the giant Phoenix facility, which treats more than 80,000 veterans a year. He said a widely reported list of 40 patients who died while awaiting appointments “does not represent the total number of veterans that we’re looking at.”